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0, 0.97422, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}33.333333%{-webkit-transform:matrix3d(1.01191, 0, 0, 0, 0, 0.97618, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.01191, 0, 0, 0, 0, 0.97618, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}35.416667%{-webkit-transform:matrix3d(1.00526, 0, 0, 0, 0, 0.98122, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00526, 0, 0, 0, 0, 0.98122, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}37.5%{-webkit-transform:matrix3d(1, 0, 0, 0, 0, 0.98773, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1, 0, 0, 0, 0, 0.98773, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}39.583333%{-webkit-transform:matrix3d(0.99617, 0, 0, 0, 0, 0.99433, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99617, 0, 0, 0, 0, 0.99433, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}41.666667%{-webkit-transform:matrix3d(0.99368, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99368, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}43.75%{-webkit-transform:matrix3d(0.99237, 0, 0, 0, 0, 1.00413, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99237, 0, 0, 0, 0, 1.00413, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}45.833333%{-webkit-transform:matrix3d(0.99202, 0, 0, 0, 0, 1.00651, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99202, 0, 0, 0, 0, 1.00651, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}47.916667%{-webkit-transform:matrix3d(0.99241, 0, 0, 0, 0, 1.00726, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99241, 0, 0, 0, 0, 1.00726, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}50%{-webkit-transform:matrix3d(0.99329, 0, 0, 0, 0, 1.00671, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99329, 0, 0, 0, 0, 1.00671, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}52.083333%{-webkit-transform:matrix3d(0.99447, 0, 0, 0, 0, 1.00529, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99447, 0, 0, 0, 0, 1.00529, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}54.166667%{-webkit-transform:matrix3d(0.99577, 0, 0, 0, 0, 1.00346, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99577, 0, 0, 0, 0, 1.00346, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}56.25%{-webkit-transform:matrix3d(0.99705, 0, 0, 0, 0, 1.0016, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99705, 0, 0, 0, 0, 1.0016, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}58.333333%{-webkit-transform:matrix3d(0.99822, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99822, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}60.416667%{-webkit-transform:matrix3d(0.99921, 0, 0, 0, 0, 0.99884, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(0.99921, 0, 0, 0, 0, 0.99884, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}62.5%{-webkit-transform:matrix3d(1, 0, 0, 0, 0, 0.99816, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1, 0, 0, 0, 0, 0.99816, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}64.583333%{-webkit-transform:matrix3d(1.00057, 0, 0, 0, 0, 0.99795, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00057, 0, 0, 0, 0, 0.99795, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}66.666667%{-webkit-transform:matrix3d(1.00095, 0, 0, 0, 0, 0.99811, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00095, 0, 0, 0, 0, 0.99811, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}68.75%{-webkit-transform:matrix3d(1.00114, 0, 0, 0, 0, 0.99851, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00114, 0, 0, 0, 0, 0.99851, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}70.833333%{-webkit-transform:matrix3d(1.00119, 0, 0, 0, 0, 0.99903, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00119, 0, 0, 0, 0, 0.99903, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}72.916667%{-webkit-transform:matrix3d(1.00114, 0, 0, 0, 0, 0.99955, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00114, 0, 0, 0, 0, 0.99955, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}75%{-webkit-transform:matrix3d(1.001, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.001, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}77.083333%{-webkit-transform:matrix3d(1.00083, 0, 0, 0, 0, 1.00033, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1);transform:matrix3d(1.00083, 0, 0, 0, 0, 1.00033, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1)}79.166667%{-webkit-transform:matrix3d(1.00063, 0, 0, 0, 0, 1.00052, 0, 0, 0, 0, 1, 0, 0, 0, 0, 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Rack up XP, collect badges and climb the ranks. Turn learning to code into a daily game." dochead="1" name="description"/><link dochead="1" href="/_cdn/s3.amazonaws.com/edabit-images/logo_main_medium.png" rel="icon" type="image/png"/><meta charset="utf-8" dochead="1"/><meta content="coding challenges, programming challenges" dochead="1" name="keywords"/><meta content="summary_large_image" dochead="1" name="twitter:card"/><meta content="@praxide" dochead="1" name="twitter:site"/><meta content="Learn to code with fun, bite-sized challenges. Earn XP, unlock achievements and level up. It's like Duolingo for learning to code." dochead="1" property="og:description"/><meta content="/_cdn/s3.amazonaws.com/edabit-images/logo_wide_large.png" dochead="1" property="og:image"/><meta content="praxide" dochead="1" property="og:site_name"/><meta content="Learn to Code with 10,000+ Interactive Challenges" dochead="1" property="og:title"/><meta content="website" dochead="1" property="og:type"/><style data-captured-cssinjs="true">.s-alert-box, .s-alert-box * { box-sizing: border-box; }
.s-alert-box { position: fixed; background: rgba(42, 45, 50, 0.85); padding: 22px; line-height: 1.4; z-index: 1000; pointer-events: none; color: rgba(250, 251, 255, 0.95); font-size: 100%; font-family: "Helvetica Neue", "Segoe UI", Helvetica, Arial, sans-serif; transition: top 0.4s, bottom 0.4s; }
.s-alert-box.s-alert-show { pointer-events: auto; }
.s-alert-box a { color: inherit; opacity: 0.7; font-weight: 700; }
.s-alert-box a:hover, .s-alert-box a:focus { opacity: 1; }
.s-alert-box p { margin: 0px; }
.s-alert-box.s-alert-show, .s-alert-box.s-alert-visible { pointer-events: auto; }
.s-alert-bottom-left { inset: auto auto 30px 30px; }
.s-alert-top-left { inset: 30px auto auto 30px; }
.s-alert-top-right { inset: 30px 30px auto auto; }
.s-alert-bottom-right { inset: auto 30px 30px auto; }
.s-alert-bottom { width: 100%; max-width: 100%; inset: auto 0px 0px; }
.s-alert-top { width: 100%; max-width: 100%; inset: 0px 0px auto; }
.s-alert-info { background: rgb(41, 135, 205); color: rgb(255, 255, 255); }
.s-alert-success { background: rgb(45, 184, 75); color: rgb(255, 255, 255); }
.s-alert-warning { background: rgb(250, 188, 46); color: rgb(255, 255, 255); }
.s-alert-error { background: rgb(219, 40, 40); color: rgb(255, 255, 255); }
[class^="s-alert-effect-"].s-alert-hide, [class*=" s-alert-effect-"].s-alert-hide { animation-direction: reverse; }
.s-alert-box-height { visibility: hidden; position: fixed; }.s-alert-effect-jelly a { color: rgb(255, 255, 255); }
.s-alert-effect-jelly a:hover, .s-alert-effect-jelly a:focus { color: rgb(255, 255, 255); }
.s-alert-effect-jelly .s-alert-close::before, .s-alert-effect-jelly .s-alert-close::after { background: rgb(255, 255, 255); }
.s-alert-effect-jelly .s-alert-close:hover::before, .s-alert-effect-jelly .s-alert-close:hover::after { background: rgb(255, 255, 255); }
.s-alert-effect-jelly.s-alert-show { animation-name: animJelly; animation-duration: 1s; animation-timing-function: linear; }
.s-alert-effect-jelly.s-alert-hide { animation-name: animFade; animation-duration: 0.3s; }
@-webkit-keyframes animFade { 
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@keyframes animFade { 
  0% { opacity: 0; }
  100% { opacity: 1; }
}
@-webkit-keyframes animJelly { 
  0% { transform: matrix3d(0.7, 0, 0, 0, 0, 0.7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  2.08333% { transform: matrix3d(0.75266, 0, 0, 0, 0, 0.76342, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  4.16667% { transform: matrix3d(0.81071, 0, 0, 0, 0, 0.84545, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  6.25% { transform: matrix3d(0.86808, 0, 0, 0, 0, 0.9286, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  8.33333% { transform: matrix3d(0.92038, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  10.4167% { transform: matrix3d(0.96482, 0, 0, 0, 0, 1.05202, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  12.5% { transform: matrix3d(1, 0, 0, 0, 0, 1.08204, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  14.5833% { transform: matrix3d(1.02563, 0, 0, 0, 0, 1.09149, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  16.6667% { transform: matrix3d(1.04227, 0, 0, 0, 0, 1.08453, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  18.75% { transform: matrix3d(1.05102, 0, 0, 0, 0, 1.06666, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  20.8333% { transform: matrix3d(1.05334, 0, 0, 0, 0, 1.04355, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  22.9167% { transform: matrix3d(1.05078, 0, 0, 0, 0, 1.02012, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  25% { transform: matrix3d(1.04487, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  27.0833% { transform: matrix3d(1.03699, 0, 0, 0, 0, 0.98534, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  29.1667% { transform: matrix3d(1.02831, 0, 0, 0, 0, 0.97688, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  31.25% { transform: matrix3d(1.01973, 0, 0, 0, 0, 0.97422, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  33.3333% { transform: matrix3d(1.01191, 0, 0, 0, 0, 0.97618, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  35.4167% { transform: matrix3d(1.00526, 0, 0, 0, 0, 0.98122, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  37.5% { transform: matrix3d(1, 0, 0, 0, 0, 0.98773, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  39.5833% { transform: matrix3d(0.99617, 0, 0, 0, 0, 0.99433, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  41.6667% { transform: matrix3d(0.99368, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  43.75% { transform: matrix3d(0.99237, 0, 0, 0, 0, 1.00413, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  45.8333% { transform: matrix3d(0.99202, 0, 0, 0, 0, 1.00651, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  47.9167% { transform: matrix3d(0.99241, 0, 0, 0, 0, 1.00726, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  50% { transform: matrix3d(0.99329, 0, 0, 0, 0, 1.00671, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  52.0833% { transform: matrix3d(0.99447, 0, 0, 0, 0, 1.00529, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  54.1667% { transform: matrix3d(0.99577, 0, 0, 0, 0, 1.00346, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  56.25% { transform: matrix3d(0.99705, 0, 0, 0, 0, 1.0016, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  58.3333% { transform: matrix3d(0.99822, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  60.4167% { transform: matrix3d(0.99921, 0, 0, 0, 0, 0.99884, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  62.5% { transform: matrix3d(1, 0, 0, 0, 0, 0.99816, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  64.5833% { transform: matrix3d(1.00057, 0, 0, 0, 0, 0.99795, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  66.6667% { transform: matrix3d(1.00095, 0, 0, 0, 0, 0.99811, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  68.75% { transform: matrix3d(1.00114, 0, 0, 0, 0, 0.99851, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  70.8333% { transform: matrix3d(1.00119, 0, 0, 0, 0, 0.99903, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  72.9167% { transform: matrix3d(1.00114, 0, 0, 0, 0, 0.99955, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  75% { transform: matrix3d(1.001, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  77.0833% { transform: matrix3d(1.00083, 0, 0, 0, 0, 1.00033, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  79.1667% { transform: matrix3d(1.00063, 0, 0, 0, 0, 1.00052, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  81.25% { transform: matrix3d(1.00044, 0, 0, 0, 0, 1.00058, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  83.3333% { transform: matrix3d(1.00027, 0, 0, 0, 0, 1.00053, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  85.4167% { transform: matrix3d(1.00012, 0, 0, 0, 0, 1.00042, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  87.5% { transform: matrix3d(1, 0, 0, 0, 0, 1.00027, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  89.5833% { transform: matrix3d(0.99991, 0, 0, 0, 0, 1.00013, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  91.6667% { transform: matrix3d(0.99986, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  93.75% { transform: matrix3d(0.99983, 0, 0, 0, 0, 0.99991, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  95.8333% { transform: matrix3d(0.99982, 0, 0, 0, 0, 0.99985, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  97.9167% { transform: matrix3d(0.99983, 0, 0, 0, 0, 0.99984, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  100% { transform: matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
}
@keyframes animJelly { 
  0% { transform: matrix3d(0.7, 0, 0, 0, 0, 0.7, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
  2.08333% { transform: matrix3d(0.75266, 0, 0, 0, 0, 0.76342, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1); }
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class="color-empty" height="10" width="10" x="0" y="22"><title></title></rect><rect class="color-empty" height="10" width="10" x="0" y="33"><title></title></rect><rect class="color-empty" height="10" width="10" x="0" y="44"><title></title></rect></g></g><g class="react-calendar-heatmap-weekday-labels" transform="translate(10, 14)"></g></svg></div></div><div class="hidden-small" style="margin-top: 20px; text-align: center;"><svg class="CircularProgressbar no-highlight" viewbox="0 0 100 100"><path class="CircularProgressbar-trail" d="
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In the Code tab above you'll spot a starter function that looks like this: public class Program { public static bool ReturnTrue() { } } All you need to do is type return true; between the curly braces { } and then hit the Check button. Once you've done that …</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">strings</div><div class="ui small label">validation</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/xfRucdwGksiyjZq4K"><h3 class="header">Sum Two Numbers and Return It</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that accepts two numbers as arguments and gives back their sum. Examples Sum(3, 2) ➞ 5 Sum(-3, -6) ➞ -9 Sum(7, 3) ➞ 10 Notes Remember to return your result. Stuck on a challenge? Look for hints in the Resources tab. Still stuck? Reveal the answer in the Solutions tab.</div><div class="tags"><div class="ui small label">algebra</div><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/bizjGL4wyd8PwR4Ke"><h3 class="header">Change Minutes into Seconds</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that accepts an integer minutes and turns it into seconds. Examples convert(5) ➞ 300 convert(3) ➞ 180 convert(2) ➞ 120 Notes Remember to return your result. Stuck on a challenge? Look for hints in the Resources tab. Still stuck? Reveal the answer in the Solutions tab.</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/RzkLShpDgDqG3c45H"><h3 class="header">Increment an Integer and Hand Back the Result</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Write a function that receives a number as its input, bumps that number up by +1, and hands back the outcome. Examples Addition(0) ➞ 1 Addition(9) ➞ 10 Addition(-3) ➞ -2 Notes Remember to actually return your answer. Feeling stuck on a challenge? Grab a hint from the Resources tab. Still totally stuck? Unlock the walkthroughs in the So …</div><div class="tags"><div class="ui small label">algebra</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/L2fwjYi9YixY8kJfK"><h3 class="header">Calculate a Circuit's Power</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that receives a voltage and a current, then hands back the power it produces.</div><div class="tags"><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/nkkKguC5TgWnBiMLA"><h3 class="header">Turn Years Into Days</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that receives an age in years and hands back that same age counted in days. Examples CalcAge(65) ➞ 23725 CalcAge(0) ➞ 0 CalcAge(20) ➞ 7300 Notes Treat every year as exactly 365 days for this challenge. Skip leap years and the days between the last birthday and today. Assume the input is always a positive integer.</div><div class="tags"><div class="ui small label">algebra</div><div class="ui small label">algorithms</div><div class="ui small label">math</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/aiaLK9Tg6qc8sLDjv"><h3 class="header">Find a Triangle Area</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that receives the base and height of a triangle and gives back its area. Examples triArea(3, 2) ➞ 3 triArea(7, 4) ➞ 14 triArea(10, 10) ➞ 50 Notes A triangle's area is: (base * height) / 2 Remember to actually return your answer. Feeling stuck on a challenge? Grab a hint from the Resources tab. Still really st …</div><div class="tags"><div class="ui small label">geometry</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/4p5WBxogs2ENAb4Wu"><h3 class="header">Give Back the Remainder of Two Numbers</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">C# gives you a single operator that hands you the remainder left over from a division. Two numbers arrive as parameters. Dividing the first parameter by the second leaves a remainder, which may well be zero. Send that value back. Examples Remainder(1, 3) ➞ 1 Remainder(3, 4) ➞ 3 Remainder(-9, 45) ➞ -9 Remainder …</div><div class="tags"><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/7KX5NogxnTzrKEd5P"><h3 class="header">Is This Number Less than or Equal to Zero?</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that takes a single number as its only argument and hands back true when that number is less than or equal to zero, and false otherwise. Examples lessThanOrEqualToZero(5) ➞ false lessThanOrEqualToZero(0) ➞ true lessThanOrEqualToZero(-2) ➞ true Notes Remember to return your answer. Stuck on a challenge, find …</div><div class="tags"><div class="ui small label">conditions</div><div class="ui small label">language_fundamentals</div><div class="ui small label">validation</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/3ZwEJFANGaSpqnzrs"><h3 class="header">Sum Below 100?</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Write a function that takes two numbers and returns true when their combined total is below 100. Otherwise, return false. Examples lessThan100(22, 15) ➞ true // 22 + 15 = 37 lessThan100(83, 34) ➞ false // 83 + 34 = 117 lessThan100(3, 77) ➞ true Notes N/A</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">validation</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/oDnoAHEnAsL78sQh9"><h3 class="header">Do the Integers Match?</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Build a function that accepts two integers and reports whether they hold the same value. Examples IsEqual(5, 6) ➞ false IsEqual(1, 1) ➞ true IsEqual(36, 35) ➞ false Notes N/A</div><div class="tags"><div class="ui small label">conditions</div><div class="ui small label">language_fundamentals</div><div class="ui small label">logic</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/kcPbQts3m7Qb7Xvwe"><h3 class="header">Hand Me Something Back!</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Create a function that returns the string "something" combined with a single space " " and then the supplied argument a. Examples GiveMeSomething("is better than nothing") ➞ "something is better than nothing" GiveMeSomething("Bob Jane") ➞ "something Bob Jane" GiveMeSomething("something") ➞ "something something" Notes Assume that an input is always provided.</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">strings</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/seB6cQjuSqgudatyF"><h3 class="header">Invert the Boolean</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Write a function that flips a boolean value to its opposite. Examples Reverse(true) ➞ false Reverse(false) ➞ true Notes Remember to return the result. If a challenge has you stumped, look for hints in the Resources tab. When you're truly stuck, reveal the answer in the Solutions tab.</div><div class="tags"><div class="ui small label">conditions</div><div class="ui small label">language_fundamentals</div><div class="ui small label">logic</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/CtzPuYwxvZwkqxLda"><h3 class="header">Turn Hours into Seconds</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Create a function that turns a count of hours into the equivalent number of seconds. Examples howManySeconds(2) ➞ 7200 howManySeconds(10) ➞ 36000 howManySeconds(24) ➞ 86400 Notes There are 60 seconds in a minute and 60 minutes in an hour.</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/jkK6QYQeokdRFPCi7"><h3 class="header">Sum a Polygon's Angles</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">For a regular polygon n with n sides, return the combined total of its interior angles measured in degrees. Examples SumPolygon(3) ➞ 180 SumPolygon(4) ➞ 360 SumPolygon(6) ➞ 720 Notes n will always be greater than 2. The formula (n - 2) x 180 gives the sum of all the angle measures inside an n-sided polygon.</div><div class="tags"><div class="ui small label">functional_programming</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/e7Bxnaspmr3kMPYWg"><h3 class="header">Are Both Values Equal?</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Write a function that gives back true whenever num1 matches num2, and returns false in every other situation. Examples IsSameNum(4, 8) ➞ false IsSameNum(2, 2) ➞ true IsSameNum(0, 6) ➞ false Notes Remember to actually return your answer.</div><div class="tags"><div class="ui small label">conditions</div><div class="ui small label">language_fundamentals</div><div class="ui small label">numbers</div><div class="ui small label">validation</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/vgBEkhQNCvtqtwZFZ"><h3 class="header">Fix the Variable Assignment</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">A newcomer to C# was building a function and got a little stuck. Their code is supposed to join a given string name with the string "Praxide" and keep the result in a variable called result. Can you jump in and repair it? Examples nameString("Kiran") ➞ "KiranPraxide" nameString("Theo") ➞ "TheoPraxide" nameString("C#") ➞ "C#Praxide" Notes …</div><div class="tags"><div class="ui small label">bugs</div><div class="ui small label">functional_programming</div><div class="ui small label">language_fundamentals</div><div class="ui small label">strings</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/huxpwewKXKxWWdcsr"><h3 class="header">The "&amp;&amp;" Logic Operator</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">In C#, &amp;&amp; is one of the logical operators. The &amp;&amp; operator accepts two boolean values and gives back true only when both of them are true. Take a &amp;&amp; b: first a is examined to see if it is true or false. If a is false, false is returned. Then b is examined to see if it is true or false. If b is false, false is returned. Otherwise, true is returned (as both a and b are …</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">logic</div><div class="ui small label">validation</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/mKLy6ZN4ZhHdWTeQm"><h3 class="header">Basketball Scoring</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Picture yourself keeping score during a basketball game. Given how many 3-pointers were scored and how many 2-pointers were scored, work out the team's total points and return that value (\[2 -pointers scored, 3-pointers scored]). Examples points(1, 1) ➞ 5 points(7, 5) ➞ 29 points(38, 8) ➞ 100 Notes N/A</div><div class="tags"><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div><div class="item no-highlight" role="listitem"><div class="right floated content"><div aria-expanded="false" class="ui simple top right pointing dropdown" role="listbox" style="margin-bottom: 30px; margin-top: 0px; padding-bottom: 3px;" tabindex="0"><div aria-live="polite" class="text" role="alert"></div><i aria-hidden="true" class="ellipsis horizontal large link icon"></i><div class="menu transition" style="margin-right: -4px; margin-top: 0px; min-width: 115px;"><div aria-disabled="true" class="disabled item" role="option">Add to bookmarks</div><div aria-disabled="true" class="disabled item" role="option">Add to collection</div></div></div></div><a class="content" href="/challenge/5JzZhNdpRkDKsWwFW"><h3 class="header">Calculate a Rectangle's Perimeter</h3><div class="description" style="font-size: 1.05rem; min-height: 45px;">Write a function that accepts a length and a width and works out the perimeter of a rectangle. Examples FindPerimeter(6, 7) ➞ 26 FindPerimeter(20, 10) ➞ 60 FindPerimeter(2, 9) ➞ 22 Notes Remember to return the result. If you get stuck, look for hints in the Resources tab. If you are really stuck, check the answers in the Solutions tab.</div><div class="tags"><div class="ui small label">geometry</div><div class="ui small label">language_fundamentals</div><div class="ui small label">math</div><div class="ui small label">numbers</div></div><div style="color: rgb(45, 184, 75); float: right; font-size: 12px; padding-right: 10px; padding-top: 11px;">Very Easy</div></a></div></div><button class="ui fluid button" role="button"><span>SHOW MORE</span></button></div></div></div></div></main><footer id="Footer"><div class="ui container no-highlight" style="margin: 0px; padding: 0px;"><div class="ui fitted divider" style="margin-bottom: 20px;"></div><div class="ui horizontal right floated list" role="list"><a class="item fancy-link" href="/contact" role="listitem"><span>Contact</span></a><a class="item fancy-link" href="/_404.html" role="listitem" target="_blank"><span>Blog</span></a><a class="item fancy-link" href="/about" role="listitem"><span>About</span></a></div><div class="ui horizontal left floated list" role="list"><div class="disabled item" role="listitem">© 2021 Praxide, Inc</div><a class="item fancy-link" href="/docs/terms" role="listitem"><span>Terms</span></a><a class="item fancy-link" href="/docs/privacy" role="listitem"><span>Privacy</span></a><a class="item fancy-link" href="/roadmap" role="listitem"><span>Roadmap</span></a><a class="item fancy-link" href="/affiliates" role="listitem"><span>Affiliates</span></a><a class="item fancy-link" href="/help" role="listitem"><span>Help</span></a></div><div aria-expanded="false" class="ui button compact labeled upward dropdown icon" role="listbox" style="bottom: 0px; margin-bottom: 7px; min-width: 122px; position: fixed; right: 4px;" tabindex="0"><div aria-live="polite" class="text" role="alert">English</div><i aria-hidden="true" class="caret up icon"></i><div class="menu transition"><div aria-checked="true" aria-selected="true" class="active selected item" role="option" style="pointer-events: all;">English</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">Español</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">Français</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">Deutsch</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">Português</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">日本語</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">中文</div><div aria-checked="false" aria-selected="false" class="item" role="option" style="pointer-events: all;">Pусский</div></div></div></div></footer><div class="s-alert-wrapper"></div></div></div><script src="/cr-site.js"></script>
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