| problem_set_id,start_at,end_at | |
| 945891747886747648,2018-01-07 12:21:23,2018-09-01 12:21:23 | |
| 945893173484539904,2017-12-27 13:43:54,2018-02-22 13:43:54 | |
| 946210833720102912,2017-12-31 10:39:50,2018-01-31 10:39:50 | |
| 946220579109953536,2017-12-28 10:39:50,2018-03-31 10:39:50 | |
| 946568973493956608,2017-12-29 10:27:46,2018-01-03 17:44:00 | |
| 946634431366651904,2017-12-29 14:49:42,2017-12-30 14:49:42 | |
| 971387390413357056,2018-03-07 22:08:00,2018-12-01 22:08:00 | |
| 973120292029337600,2018-03-12 16:53:00,2018-12-01 23:59:00 | |
| 973199198354808832,2018-03-12 22:06:00,2018-06-27 08:30:00 | |
| 975737027949633536,2018-03-19 07:00:00,2018-07-01 23:59:00 | |
| 976279986487492608,2018-03-10 12:08:00,2018-07-02 23:59:00 | |
| 976297474919038976,2018-03-21 11:18:00,2018-07-01 23:59:00 | |
| 978267433912119296,2018-03-26 22:00:00,2018-06-27 08:30:00 | |
| 978351813443579904,2018-03-27 03:23:00,2018-07-01 23:59:00 | |
| 981396079619866624,2018-04-04 12:59:00,2018-07-02 23:59:00 | |
| 981435690148696064,2018-04-09 15:37:00,2018-06-27 08:30:00 | |
| 982907350127218688,2018-04-08 17:04:00,2018-07-09 17:04:00 | |
| 983494316149563392,2018-04-10 07:57:00,2018-07-01 07:57:00 | |
| 985823164560236544,2018-04-16 18:11:00,2018-07-02 23:59:00 | |
| 985823543272267776,2018-04-16 18:11:00,2018-07-03 21:11:00 | |
| 986471772443828224,2018-04-18 13:07:00,2018-07-01 23:59:00 | |
| 988408862631301120,2018-04-23 21:12:00,2018-07-24 21:12:00 | |
| 1006733628431433728,2018-06-13 11:02:00,2018-06-13 11:07:00 | |
| 1009354790106116096,2018-06-27 09:00:00,2018-06-27 11:30:00 | |
| 1009356365842907136,2018-06-27 15:00:00,2018-06-27 17:30:00 | |
| 1010899008343584768,2018-07-24 09:00:00,2018-07-24 11:10:00 | |
| 1010906088639115264,2018-07-24 15:00:00,2018-07-25 17:10:00 | |
| 1011888151529553920,2018-07-12 12:55:00,2018-07-12 15:10:00 | |
| 1016142803150655488,2018-07-12 13:00:00,2018-07-12 15:00:00 | |
| 1016196827770081280,2018-07-09 13:31:00,2018-07-17 13:31:00 | |
| 1016261907236859904,2018-07-09 18:03:00,2018-09-16 18:03:00 | |
| 1016685669463699456,2018-07-10 22:07:00,2018-07-10 23:07:00 | |
| 1016706431188807680,2018-07-10 23:30:00,2018-07-17 23:30:00 | |
| 1018177834840522752,2018-07-15 00:57:00,2018-09-15 00:57:00 | |
| 1018179394102710272,2018-07-15 01:03:00,2018-09-16 01:03:00 | |
| 1018510200696287232,2018-07-15 22:58:00,2018-09-10 23:59:00 | |
| 1034604621321977856,2018-08-31 15:55:00,2018-08-31 18:05:00 | |
| 1034726798453104640,2018-08-31 16:00:00,2018-08-31 18:00:00 | |
| 1442832197623435264,2021-09-28 20:37:00,2022-09-09 22:37:00 | |
| 1448272005727432704,2021-10-13 20:57:00,2022-01-08 18:30:00 | |
| 1448561700277579776,2021-10-14 16:11:00,2021-10-14 18:11:00 | |
| 1453197156084228096,2021-10-27 14:01:00,2021-12-11 20:17:00 | |
| 1453251686440247296,2021-10-27 14:44:00,2022-03-31 23:59:00 | |
| 1461245364737372160,2021-11-24 10:00:00,2021-11-24 12:00:00 | |
| 1462702281594728448,2021-11-24 19:20:00,2021-11-24 21:20:00 | |
| 1463064232848887808,2021-11-25 07:50:00,2021-11-25 09:50:00 | |
| 1465338407987761152,2021-11-29 23:14:00,2021-12-04 01:14:00 | |
| 1505449558237917184,2022-03-23 08:00:00,2022-07-08 23:00:00 | |
| 1505452618612748288,2022-03-20 15:52:00,2022-07-10 23:52:00 | |
| 1505461234215563264,2022-03-31 16:26:00,2022-03-31 18:26:00 | |
| 1505765950753484800,2022-03-21 19:00:00,2022-03-24 21:00:00 | |
| 1506093382454415360,2022-03-22 10:19:00,2022-04-01 12:19:00 | |
| 1506788015794831360,, | |
| 1506912270578630656,2022-03-24 19:00:00,2022-03-24 22:00:00 | |
| 1508288853776216064,2022-03-28 11:42:00,2022-03-28 13:42:00 | |
| 1508314797291356160,2022-03-28 13:26:00,2022-07-01 15:26:00 | |
| 1508432046673047552,2022-03-28 21:12:00,2023-03-03 23:12:00 | |
| 1508682554962100224,2022-03-29 15:30:00,2022-05-10 18:30:00 | |
| 1508695495105785856,, | |
| 1508696269533757440,2022-03-29 14:42:00,2022-04-10 16:42:00 | |
| 1508730177131659264,, | |
| 1508736997852737536,2022-03-29 17:24:00,2022-03-29 19:24:00 | |
| 1508976307286126592,, | |
| 1509110695332507648,2022-03-30 19:40:00,2022-04-07 23:59:00 | |
| 1509121364445925376,2022-03-30 18:52:00,2022-03-30 21:00:00 | |
| 1510141201939046400,2022-04-02 14:23:00,2022-04-02 16:23:00 | |
| 1510153688113618944,2022-04-02 15:14:00,2022-04-02 17:14:00 | |
| 1510158846025629696,2022-04-02 15:34:00,2022-04-30 17:34:00 | |
| 1510946933547405312,, | |
| 1511237730208718848,2022-04-05 15:01:00,2022-04-22 00:00:00 | |
| 1511506877514452992,2022-04-06 08:50:00,2022-05-12 00:00:00 | |
| 1516579646643351552,, | |
| 1516580869976530944,2022-04-28 13:30:00,2022-04-28 15:30:00 | |
| 1516585714325024768,2022-04-28 15:20:00,2022-04-28 17:20:00 | |
| 1516994183213330432,2022-04-21 14:30:00,2022-04-22 18:20:00 | |
| 1519238182082723840,2022-05-02 15:35:00,2022-05-11 12:00:00 | |
| 1519256329355538432,, | |
| 1519572302977572864,2022-04-28 15:00:00,2023-01-20 23:59:00 | |
| 1522121386569592832,2022-05-05 15:46:00,2022-05-15 17:46:00 | |
| 1523642319381893120,2022-05-09 20:33:00,2022-05-09 22:33:00 | |
| 1523831491291938816,2022-05-10 09:04:00,2022-05-19 13:30:00 | |
| 1525304599718817792,, | |
| 1526863148609753088,2022-05-20 14:30:00,2022-05-20 15:50:00 | |
| 1526863352599724032,2022-05-20 16:10:00,2022-05-20 17:30:00 | |
| 1527140187858329600,2022-05-19 12:02:00,2022-05-19 14:02:00 | |
| 1527143188983508992,2022-05-19 12:24:00,2022-05-19 14:24:00 | |
| 1532565413840797696,2022-06-03 11:30:00,2022-06-19 13:30:00 | |
| 1533516392757182464,2022-06-07 17:00:00,2022-06-07 17:30:00 | |
| 1533523656956166144,2022-06-07 19:30:00,2022-06-07 20:00:00 | |
| 1534887316777852928,2022-06-10 00:00:00,2022-06-24 23:59:00 | |
| 1534912579951640576,2022-06-10 00:00:00,2022-06-24 23:59:00 | |
| 1536907992653099008,, | |
| 1536908386657615872,2022-06-15 11:08:00,2022-06-23 13:08:00 | |
| 1539854379493617664,2022-06-23 14:13:00,2022-06-24 10:00:00 | |
| 1569886853035913216,2022-09-15 08:06:00,2022-12-30 14:00:00 | |
| 1569951075140825088,2022-09-14 15:27:00,2022-09-14 17:27:00 | |
| 1570701921449345024,2022-09-16 17:11:00,2022-09-18 19:11:00 | |
| 1573873347807342592,2022-09-25 11:13:00,2022-10-31 13:13:00 | |
| 1579356841221812224,, | |
| 1586869121172664320,2022-10-31 07:53:00,2022-11-12 08:05:00 | |
| 907772107457179648,2018-05-28 08:55:00,2018-07-01 23:59:00 | |
| 976304690245992448,2018-03-21 11:47:00,2018-07-30 23:59:00 | |
| 988405305127505920,2018-04-23 21:12:00,2018-07-24 21:12:00 | |
| 988420045593649152,2018-04-23 22:10:00,2018-07-12 12:30:00 | |
| 988421397803462656,2018-04-23 22:10:00,2018-07-12 12:30:00 | |
| 988429028287062016,2018-04-23 22:45:00,2018-07-01 23:59:00 | |
| 991512666910523392,2018-05-02 10:59:00,2018-05-03 10:59:00 | |
| 991518661934088192,2018-05-03 12:30:00,2018-05-03 15:02:00 | |
| 991552140172357632,2018-05-02 13:36:00,2018-07-02 23:59:00 | |
| 991552709083545600,2018-05-02 13:36:00,2018-07-13 13:36:00 | |
| 993464927173881856,2018-05-07 20:17:00,2018-06-30 20:17:00 | |
| 993469594452799488,2018-05-07 20:35:00,2018-07-12 12:30:00 | |
| 996375662707732480,2018-05-15 21:01:00,2018-07-01 23:59:00 | |
| 996580342540914688,2018-05-16 10:36:00,2018-07-02 23:59:00 | |
| 997465687935819776,2018-05-18 21:15:00,2018-06-30 23:59:00 | |
| 997467837994762240,2018-05-18 21:15:00,2018-06-30 23:58:00 | |
| 997480418717343744,2018-05-18 22:11:00,2018-07-01 23:59:00 | |
| 997481500101181440,2018-05-18 22:11:00,2018-07-30 23:59:00 | |
| 997990471924842496,2018-05-20 08:00:00,2018-07-13 23:59:00 | |
| 998550258458730496,2018-05-22 08:00:00,2018-07-12 12:30:00 | |
| 998550732364750848,2018-05-21 21:04:00,2018-07-12 12:30:00 | |
| 999655270844907520,2018-05-24 22:14:00,2018-06-30 23:59:00 | |
| 999657673686171648,2018-05-24 22:23:00,2018-07-12 12:30:00 | |
| 1002337982483947520,2018-06-01 07:55:00,2018-07-13 23:59:00 | |
| 1004520189407436800,2018-06-07 08:26:00,2018-07-13 08:26:00 | |
| 1004521562937122816,2018-06-07 08:32:00,2018-07-13 08:32:00 | |
| 1004957515048706048,2018-06-08 13:22:00,2018-07-11 23:59:00 | |
| 1006775832017711104,2018-06-13 13:49:00,2018-07-14 13:49:00 | |
| 1006777657114578944,2018-06-13 13:57:00,2018-07-30 23:59:00 | |
| 1009702000345821184,2018-06-21 15:37:00,2018-07-12 12:30:00 | |
| 1014766399611809792,2018-07-05 15:01:00,2018-07-30 15:01:00 | |
| 1452136709026902016,2021-10-25 12:30:00,2021-10-25 14:10:00 | |
| 1453312083620929536,2021-10-29 10:00:00,2021-10-29 12:00:00 | |
| 1454397164427157504,2021-10-30 18:00:00,2021-10-31 00:00:00 | |
| 1454398963846488064,2021-10-30 18:47:00,2021-10-31 13:00:00 | |
| 1454408121103618048,2021-11-06 08:20:00,2021-12-31 23:20:00 | |
| 1454413586041675776,2021-10-30 19:42:00,2021-11-17 21:42:00 | |
| 1454637334116253696,2021-11-30 10:32:00,2021-11-30 12:32:00 | |
| 1463293289114173440,, | |
| 1497369032083509248,2022-02-26 08:45:00,2022-02-26 10:20:00 | |
| 1500796695122452480,2022-03-07 19:32:00,2022-11-30 21:32:00 | |
| 1506225326429323264,2022-03-23 19:03:00,2022-03-23 21:03:00 | |
| 1506638364177350656,2022-03-23 22:25:00,2022-03-25 15:30:00 | |
| 1506820242268172288,2022-03-24 10:28:00,2022-05-01 12:28:00 | |
| 1506950486241259520,2022-03-26 18:30:00,2022-03-26 21:30:00 | |
| 1506962573202046976,2022-03-24 19:53:00,2022-05-10 21:53:00 | |
| 1507668493137625088,2022-03-26 18:39:00,2022-03-26 20:39:00 | |
| 1508044341314600960,2022-03-29 20:00:00,2022-04-04 21:30:00 | |
| 1508380125589422080,2022-03-28 17:46:00,2022-04-03 22:00:00 | |
| 1508720201440968704,2022-04-01 19:00:00,2022-04-01 22:00:00 | |
| 1509841041841811456,2022-04-02 19:00:00,2022-04-02 22:00:00 | |
| 1510119610043957248,2022-04-02 22:00:00,2022-04-05 22:00:00 | |
| 1510128720097189888,, | |
| 1510180248628432896,, | |
| 1510185074946088960,2022-04-03 14:00:00,2022-04-03 17:10:00 | |
| 1510212793100763136,2022-04-13 19:09:00,2022-04-15 21:09:00 | |
| 1510259628884459520,2022-04-04 20:20:00,2022-04-05 20:20:00 | |
| 1511901490753708032,2022-04-07 10:58:00,2022-04-18 23:58:00 | |
| 1512799630940639232,, | |
| 1512880683566960640,2022-04-10 03:50:00,2022-04-13 05:50:00 | |
| 1513804557640429568,2022-04-12 17:01:00,2022-08-31 19:01:00 | |
| 1515537428570861568,, | |
| 1516643865192996864,, | |
| 1518066110459785216,2022-04-24 11:15:00,2022-11-16 13:15:00 | |
| 1521415918603816960,2022-05-03 17:00:00,2022-05-15 19:05:00 | |
| 1525717540620374016,2022-05-18 10:00:00,2022-05-18 11:20:00 | |
| 1526022102967287808,, | |
| 1526119935204712448,2022-05-18 10:00:00,2022-05-18 11:20:00 | |
| 1526219722105077760,2022-05-16 23:10:00,2022-08-31 23:59:00 | |
| 1527172251873755136,2022-05-19 14:50:00,2022-05-19 16:30:00 | |
| 1527189401543962624,2022-05-19 15:27:00,2022-06-19 21:08:00 | |
| 1527194508343951360,, | |
| 1531799965159374848,2022-06-16 10:00:00,2022-06-16 12:00:00 | |
| 1531800730082988032,2022-06-19 16:00:00,2022-06-19 17:55:00 | |
| 1534435727466139648,2022-06-08 15:21:00,2022-06-15 22:00:00 | |
| 1538370743233671168,2022-06-19 16:00:00,2022-06-19 17:58:00 | |
| 1538500400125820928,2022-06-19 20:32:00,2022-09-10 22:32:00 | |
| 1542428395509116928,2022-06-30 16:41:00,2022-08-31 18:41:00 | |
| 1563796219855007744,2022-08-28 15:50:00,2022-10-30 17:50:00 | |
| 1566445790199607296,2022-09-04 23:18:00,2023-08-01 01:18:00 | |
| 1571671617254391808,2022-09-19 09:24:00,2022-12-30 11:24:00 | |
| 1572507830324490240,, | |
| 1572511282962300928,2022-09-21 16:59:00,2022-09-24 23:59:00 | |
| 1575671246133710848,2022-10-01 16:41:00,2022-10-07 23:59:00 | |
| 1575859989180444672,2022-09-30 22:47:00,2022-11-30 23:47:00 | |
| 1576136508196909056,2022-10-01 17:04:00,2022-12-31 23:30:00 | |
| 1579246775730700288,2022-10-10 07:09:00,2022-10-24 09:09:00 | |
| 1579338017684586496,2022-10-10 13:07:00,2023-03-01 15:07:00 | |
| 1581820628885565440,2022-10-23 09:33:00,2022-11-20 11:33:00 | |
| 1582926585942388736,2022-10-20 10:47:00,2022-10-26 21:47:00 | |
| 1584449504463958016,2022-10-24 15:38:00,2022-10-24 23:00:00 | |
| 1584717559660158976,, | |
| 1584880173333753856,2022-10-25 20:10:00,2022-11-06 22:10:00 | |
| 1585176972886573056,2022-10-31 10:00:00,2022-10-31 12:00:00 | |
| 1585980900461015040,2022-10-31 18:00:00,2022-11-06 23:04:00 | |
| 1588852692749934592,, | |
| 1588852900745474048,2022-11-05 19:16:00,2022-11-19 21:16:00 | |
| 1590255906913378304,2022-11-09 16:11:00,2023-11-08 18:11:00 | |
| 1590510253681274880,2022-11-10 09:22:00,2022-12-31 11:22:00 | |
| 1591717177194045440,, | |
| 1454642205565468672,2021-10-31 10:52:00,2021-10-31 12:52:00 | |
| 1454655003460714496,2021-10-31 11:45:00,2021-10-31 13:45:00 | |
| 1454979241967173632,2021-11-01 09:09:00,2021-12-06 11:09:00 | |
| 1456144425527934976,, | |
| 1456159861753643008,2021-11-04 15:21:00,2022-11-02 17:21:00 | |
| 1462613641430630400,2021-11-22 10:46:00,2021-12-31 23:59:00 | |