| problem_set_id,start_at,end_at | |
| 1141664263412867072,2019-06-20 19:06:00,2019-06-21 08:10:00 | |
| 1141871597544235008,2019-06-21 10:30:00,2019-06-21 12:10:00 | |
| 1142678539904704512,2019-06-24 10:30:00,2019-06-24 11:50:00 | |
| 1144433753422782464,2019-06-28 10:32:00,2019-06-28 11:50:00 | |
| 1144873297255292928,2019-07-04 09:00:00,2019-07-04 11:00:00 | |
| 1154656576086339584,2019-07-26 15:35:00,2020-07-02 17:35:00 | |
| 1161926851664535552,2019-08-15 17:04:00,2020-08-01 19:04:00 | |
| 1162286122977714176,2019-08-16 16:52:00,2020-08-02 18:52:00 | |
| 1166973655596093440,2019-08-29 15:19:00,2020-08-15 17:19:00 | |
| 1166996045784895488,2019-08-29 16:48:00,2020-08-14 18:48:00 | |
| 1197355064769286144,2019-11-21 11:22:00,2019-12-04 15:22:00 | |
| 1199243239020204032,2019-11-26 16:27:00,2019-11-26 18:27:00 | |
| 1199252001374236672,2019-11-26 17:01:00,2020-11-14 19:01:00 | |
| 1199956122012127232,2019-12-05 13:15:00,2019-12-05 15:15:00 | |
| 1223262405173334016,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1223827961320460288,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1223828183350136832,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1224238981717315584,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1235580637940056064,2020-03-06 10:25:00,2020-03-06 10:35:00 | |
| 1237021125809405952,2020-03-10 10:20:00,2020-03-10 10:35:00 | |
| 1239578928189153280,2020-03-17 10:20:00,2020-03-17 10:40:00 | |
| 1240656060122275840,2020-03-20 10:25:00,2020-03-20 10:35:00 | |
| 1242122726542811136,2020-03-24 10:20:00,2020-03-24 10:35:00 | |
| 1244651531337605120,2020-03-31 10:20:00,2020-03-31 10:35:00 | |
| 1245657582174646272,2020-04-03 10:20:00,2020-04-03 10:35:00 | |
| 1250827616576516096,2020-04-17 10:20:00,2020-04-17 10:35:00 | |
| 1252274719689453568,2020-04-21 10:20:00,2020-04-21 10:35:00 | |
| 1258940953630167040,2020-05-09 10:20:00,2020-05-09 10:35:00 | |
| 1261117521819688960,2020-05-15 10:20:00,2020-05-15 10:35:00 | |
| 1262566991879028736,2020-05-19 10:20:00,2020-05-19 10:35:00 | |
| 1265105109941305344,2020-05-26 10:22:00,2020-05-26 10:38:00 | |
| 1266193645851459584,2020-05-29 10:27:00,2020-05-29 12:27:00 | |
| 1271229573939519488,2020-06-12 10:20:00,2020-06-12 10:35:00 | |
| 1276899212220952576,2020-06-28 08:30:00,2020-06-30 00:00:00 | |
| 1277244126901301248,2020-06-30 10:20:00,2020-06-30 12:20:00 | |
| 1367011090038525952,2021-03-03 15:16:00,2021-03-14 17:16:00 | |
| 1370739311519260672,2021-03-14 14:00:00,2021-03-14 17:00:00 | |
| 1372188600783720448,2021-03-20 10:00:00,2021-03-20 13:00:00 | |
| 1375730146899726336,2021-03-27 16:41:00,2021-12-31 18:41:00 | |
| 1394475484857126912,2021-05-18 15:40:00,2021-05-25 17:19:00 | |
| 1394622509615566848,2021-06-21 10:00:00,2021-06-21 11:30:00 | |
| 1400269004416548864,2021-09-01 09:00:00,2021-09-01 11:30:00 | |
| 1402131958653145088,2021-07-05 14:00:00,2021-07-05 16:00:00 | |
| 1410482987322064896,2021-07-05 14:00:00,2021-07-05 16:00:00 | |
| 1435863447750422528,2021-09-09 15:09:00,2021-12-31 23:09:00 | |
| 1436998105733476352,2021-09-12 18:30:00,2021-09-18 22:30:00 | |
| 1439055237347201024,2021-09-24 07:00:00,2021-10-02 22:30:00 | |
| 1445295044341706752,2021-10-13 06:00:00,2021-10-20 22:30:00 | |
| 1445296720163287040,2021-10-16 06:00:00,2021-10-22 22:30:00 | |
| 1449734163045081088,2021-10-18 08:15:00,2021-10-18 08:30:00 | |
| 1450083480125698048,2021-10-25 09:30:00,2021-10-25 11:30:00 | |
| 1453586491258314752,2021-10-29 09:10:00,2021-10-29 11:10:00 | |
| 1455715026966585344,2021-11-03 10:20:00,2021-11-03 11:50:00 | |
| 1456830688102842368,, | |
| 1456835273429893120,2021-11-06 12:05:00,2022-02-01 14:05:00 | |
| 1457730668876914688,2021-11-09 11:00:00,2021-11-09 12:18:00 | |
| 1458701347926839296,2021-11-11 15:40:00,2021-12-31 15:39:00 | |
| 1466267247970930688,2021-12-02 14:00:00,2021-12-06 22:30:00 | |
| 1468950146246627328,2021-12-10 07:30:00,2021-12-14 10:00:00 | |
| 1471317869355216896,2021-12-16 14:30:00,2021-12-21 10:00:00 | |
| 1482613016042811392,2022-01-17 10:20:00,2022-01-21 08:00:00 | |
| 1483003134439628800,2022-01-17 18:00:00,2022-03-05 17:06:00 | |
| 1505100301241692160,2022-03-19 18:00:00,2022-04-03 23:59:00 | |
| 1519273601608466432,2022-04-28 10:05:00,2022-04-28 11:30:00 | |
| 1525365969457934336,, | |
| 1526539914781708288,2022-05-17 20:26:00,2022-06-01 21:01:00 | |
| 1533339203478736896,2022-06-05 14:44:00,2022-06-22 21:40:00 | |
| 1533370093974028288,2022-06-05 16:47:00,2022-06-22 21:38:00 | |
| 1533713476366077952,2022-06-06 15:31:00,2022-06-22 21:41:00 | |
| 1539974164801904640,2022-07-06 09:00:00,2022-07-06 11:00:00 | |
| 1556194305084461056,2022-08-07 16:23:00,2022-08-07 18:23:00 | |
| 1557389817372532736,2022-08-10 23:33:00,2023-07-08 01:33:00 | |
| 1563878122683514880,2022-08-29 21:15:00,2022-08-29 23:15:00 | |
| 1563890964035956736,2022-08-29 08:20:00,2022-08-29 08:30:00 | |
| 1564979950132469760,2022-09-01 10:20:00,2022-09-01 10:30:00 | |
| 1569359107427856384,2022-09-13 08:20:00,2022-09-13 10:35:00 | |
| 1569493759262134272,2022-09-13 09:13:00,2022-09-14 11:13:00 | |
| 1570065401013010432,2022-09-14 23:02:00,2022-09-30 01:02:00 | |
| 1570079347946225664,2022-09-15 10:20:00,2022-09-15 10:30:00 | |
| 1570402474983100416,2022-09-15 21:21:00,2022-09-15 23:21:00 | |
| 1570669085904277504,2022-09-16 15:00:00,2022-09-30 17:00:00 | |
| 1571529487601041408,2022-09-19 08:20:00,2022-09-19 08:30:00 | |
| 1572626373544181760,2022-09-22 10:20:00,2022-09-22 10:30:00 | |
| 1574045227231145984,2022-09-26 08:20:00,2022-09-26 08:30:00 | |
| 1574422194333876224,2022-09-27 10:20:00,2022-09-27 10:30:00 | |
| 1575159496333176832,2022-09-29 10:20:00,2022-09-29 10:30:00 | |
| 1576534329676926976,2022-10-02 19:27:00,2022-10-02 21:27:00 | |
| 1577665391081680896,2022-10-06 10:20:00,2022-10-06 10:30:00 | |
| 1579145438204526592,2022-10-10 08:20:00,2022-10-10 08:30:00 | |
| 1579485227327938560,2022-10-11 10:20:00,2022-10-11 10:30:00 | |
| 1580229796197818368,2022-10-13 10:20:00,2022-10-13 10:30:00 | |
| 1580968295469408256,2022-10-15 01:06:00,2022-10-15 03:06:00 | |
| 1581648289157869568,2022-10-17 08:20:00,2022-10-17 08:30:00 | |
| 1581877006501146624,2022-10-17 15:30:00,2022-10-17 17:00:00 | |
| 1581903703879442432,2022-10-22 15:03:00,2022-11-30 17:03:00 | |
| 1582759352221904896,2022-10-20 10:20:00,2022-10-20 10:40:00 | |
| 1584147184375181312,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1585540320106938368,2022-10-30 00:59:00,2022-11-06 23:59:00 | |
| 1588087231561101312,2022-11-07 10:00:00,2022-11-07 10:55:00 | |
| 1589452585390600192,2022-11-07 11:05:00,2022-11-07 11:50:00 | |
| 1223106305048334336,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1233033326684712960,2020-02-27 22:16:00,2021-02-10 00:16:00 | |
| 1233038024565239808,2020-02-27 22:35:00,2021-02-18 00:35:00 | |
| 1234313968198266880,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1247189514603638784,2020-04-07 10:20:00,2020-04-07 10:35:00 | |
| 1249670395570569216,2020-04-14 10:20:00,2020-04-14 10:40:00 | |
| 1259875900507529216,2020-05-12 10:20:00,2020-05-12 10:35:00 | |
| 1294148779431657472,2020-08-14 13:47:00,2020-11-30 15:47:00 | |
| 1377350042085081088,2021-04-01 13:45:00,2021-04-01 14:00:00 | |
| 1379997903516258304,2021-04-08 13:40:00,2021-04-08 14:00:00 | |
| 1387633715916754944,2021-04-29 13:45:00,2021-04-29 14:10:00 | |
| 1405804291402416128,2021-06-18 16:25:00,2021-07-01 00:00:00 | |
| 1408319357151993856,2021-06-25 15:00:00,2021-07-31 17:00:00 | |
| 1410259119535009792,2021-07-01 08:30:00,2021-07-01 10:10:00 | |
| 1410398722250452992,2021-07-01 08:43:00,2021-07-01 10:30:00 | |
| 1420679984359940096,2021-07-29 17:37:00,2022-07-01 21:53:00 | |
| 1421678093612707840,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1438865166790574080,2021-09-18 07:00:00,2021-09-26 22:30:00 | |
| 1439079721131233280,2021-09-29 07:00:00,2021-10-14 22:30:00 | |
| 1439083105800175616,2021-10-10 07:00:00,2021-10-16 22:30:00 | |
| 1447579653186392064,2021-10-12 11:00:00,2021-10-12 12:30:00 | |
| 1448494052621676544,2021-10-14 11:40:00,2021-10-14 11:50:00 | |
| 1449638991887970304,2021-10-17 15:30:00,2021-10-19 10:00:00 | |
| 1450114858926075904,2021-10-19 11:05:00,2021-10-19 16:45:00 | |
| 1450269245430427648,, | |
| 1450376258579722240,, | |
| 1452288299209748480,2021-10-25 07:00:00,2021-10-31 22:30:00 | |
| 1452541987945988096,2021-10-19 11:00:00,2021-10-19 11:35:00 | |
| 1452598163106709504,2021-10-29 06:30:00,2021-10-29 09:00:00 | |
| 1452617835851968512,2021-10-25 20:46:00,2021-10-31 22:46:00 | |
| 1452638426265042944,2021-10-29 18:30:00,2021-10-29 21:30:00 | |
| 1452639720090267648,2021-10-29 18:30:00,2021-10-29 21:30:00 | |
| 1452924634916352000,2021-10-26 17:06:00,2021-10-28 19:06:00 | |
| 1453226066600726528,2021-10-27 13:03:00,2021-10-27 15:03:00 | |
| 1457330165365096448,2021-11-07 20:52:00,2021-11-07 22:52:00 | |
| 1459859579532963840,2021-11-14 20:23:00,2021-11-14 22:23:00 | |
| 1459885710521778176,2021-11-14 22:16:00,2021-11-14 23:16:00 | |
| 1460136222912114688,, | |
| 1460139055631155200,, | |
| 1460143751998275584,2021-11-20 09:15:00,2021-11-20 09:45:00 | |
| 1460147267038199808,2021-11-15 15:26:00,2021-11-15 21:57:00 | |
| 1460170876799643648,2021-11-15 19:30:00,2021-11-15 20:20:00 | |
| 1460213231998058496,2021-11-20 11:15:00,2021-11-20 11:45:00 | |
| 1460213494549540864,2021-11-21 09:15:00,2021-11-21 09:45:00 | |
| 1460213724967190528,2021-11-21 11:15:00,2021-11-21 11:45:00 | |
| 1460213920288174080,2021-11-20 13:15:00,2021-11-20 13:45:00 | |
| 1460214070062575616,2021-11-20 15:15:00,2021-11-20 15:45:00 | |
| 1460214163267764224,2021-11-20 17:15:00,2021-11-20 17:45:00 | |
| 1460214286692610048,2021-11-20 19:15:00,2021-11-20 19:45:00 | |
| 1460861203135033344,2021-11-17 14:43:00,2021-11-17 16:43:00 | |
| 1460886862789570560,2021-11-17 20:40:00,2021-11-17 22:40:00 | |
| 1461237855941783552,2021-11-18 15:40:00,2021-11-18 17:40:00 | |
| 1461514687343296512,2021-11-19 17:10:00,2021-11-25 12:00:00 | |
| 1506959395920297984,2022-03-25 08:15:00,2022-03-25 08:30:00 | |
| 1515721751982747648,2022-04-18 08:00:00,2022-04-29 23:59:00 | |
| 1516675529309581312,2022-04-20 15:18:00,2023-04-20 15:17:00 | |
| 1526371996538294272,2022-05-17 10:10:00,2022-05-17 10:30:00 | |
| 1527296709783597056,2022-05-20 08:10:00,2022-05-20 08:30:00 | |
| 1536304162177540096,2022-06-14 13:30:00,2022-06-14 15:30:00 | |
| 1538724662589779968,2022-06-20 00:00:00,2022-06-30 00:00:00 | |
| 1539526126832697344,2022-06-22 16:29:00,2022-06-22 21:36:00 | |
| 1539800071389564928,2022-06-23 10:37:00,2022-07-10 12:37:00 | |
| 1539859350960205824,2022-06-23 14:33:00,2022-06-23 16:33:00 | |
| 1539893651055566848,2022-06-23 16:49:00,2022-07-05 18:49:00 | |
| 1539972363251867648,2022-06-23 22:02:00,2022-07-05 00:02:00 | |
| 1539972668802715648,2022-06-23 22:04:00,2022-06-24 00:04:00 | |
| 1539973688165392384,2022-06-23 22:07:00,2022-07-05 00:07:00 | |
| 1539974545908940800,2022-06-23 22:11:00,2022-07-04 00:11:00 | |
| 1540525644533448704,2022-06-25 10:41:00,2022-07-04 12:41:00 | |
| 1540709515015208960,, | |
| 1542175585957826560,2022-06-30 08:20:00,2022-06-30 10:10:00 | |
| 1542685266132324352,2022-07-04 08:00:00,2022-07-04 12:00:00 | |
| 1542686533273513984,2022-07-04 09:00:00,2022-07-04 11:00:00 | |
| 1542708330991702016,2022-07-01 22:00:00,2022-07-02 12:40:00 | |
| 1558449252513665024,2022-08-13 21:43:00,2022-08-13 23:43:00 | |
| 1563091893062873088,2022-08-26 17:11:00,2022-08-31 19:11:00 | |
| 1564237190778482688,2022-08-30 10:20:00,2022-08-30 10:30:00 | |
| 1565661102979747840,2022-09-03 13:50:00,2022-09-03 15:40:00 | |
| 1566472002674429952,2022-09-05 08:20:00,2022-09-05 08:30:00 | |
| 1566988912159817728,, | |
| 1567656285720215552,2022-09-08 08:30:00,2022-09-08 10:30:00 | |
| 1567704036365508608,2022-09-08 10:20:00,2022-09-08 10:45:00 | |
| 1574616966478802944,2022-09-29 14:00:00,2022-09-29 16:30:00 | |
| 1575041121992765440,2022-09-28 16:35:00,2022-09-28 18:35:00 | |
| 1575324944517230592,, | |
| 1575996449552474112,2022-10-01 07:49:00,2022-10-09 09:49:00 | |
| 1581997267066028032,2022-10-17 21:13:00,2022-10-17 23:13:00 | |
| 1584193164470534144,2022-10-24 08:20:00,2022-10-24 08:30:00 | |
| 1584564133039054848,2022-10-25 10:20:00,2022-10-25 10:30:00 | |
| 1585295663548628992,2022-10-27 10:20:00,2022-10-27 10:30:00 | |
| 1585540740279730176,2022-11-13 00:00:00,2022-11-20 23:59:00 | |
| 1585541273182830592,2022-12-11 00:00:00,2022-12-18 23:59:00 | |
| 1586741370470031360,2022-10-31 08:20:00,2022-10-31 08:30:00 | |
| 1587826778415071232,2022-11-03 10:20:00,2022-11-03 10:30:00 | |
| 1589271493203226624,2022-11-07 08:20:00,2022-11-07 08:30:00 | |
| 1589625907537534976,, | |
| 1589806196666695680,2022-11-08 10:20:00,2022-11-08 10:32:00 | |
| 1590267396538093568,2022-11-09 16:57:00,2022-11-16 07:58:00 | |
| 1590271263774466048,2022-11-09 17:12:00,2022-11-16 07:00:00 | |
| 1590530240479354880,2022-11-10 10:20:00,2022-11-10 10:30:00 | |
| 1451033107394457600,2021-10-21 11:49:00,2021-10-21 12:10:00 | |
| 1458982004015403008,2021-12-01 10:00:00,2021-12-03 23:50:00 | |
| 1460525223002619904,2021-12-15 10:00:00,2021-12-15 11:40:00 | |
| 1529388221103325184,2022-05-27 10:00:00,2022-05-28 23:50:00 | |