| problem_set_id,start_at,end_at | |
| 980630834697732096,2018-04-02 10:18:00,2018-04-20 10:18:00 | |
| 980708564193775616,2018-04-02 15:27:00,2018-04-02 18:30:00 | |
| 983189131095175168,2018-04-09 18:56:00,2018-04-09 20:50:00 | |
| 985729349153398784,2018-04-16 08:30:00,2018-04-16 16:50:00 | |
| 988247803912032256,2018-04-23 14:26:00,2018-04-23 18:30:00 | |
| 991929732889067520,2018-05-03 14:36:00,2018-05-03 21:00:00 | |
| 993297946235777024,2018-05-07 14:20:00,2018-05-07 18:20:00 | |
| 995872605637046272,2018-05-14 14:20:00,2018-05-14 18:20:00 | |
| 996947876029001728,2018-05-17 14:20:00,2018-05-17 21:00:00 | |
| 1000708115497418752,2018-05-28 16:00:00,2018-05-28 18:18:00 | |
| 1000923669848072192,2018-05-28 14:15:00,2018-05-28 18:25:00 | |
| 1002063695395000320,2018-05-31 14:20:00,2018-05-31 21:10:00 | |
| 1016097133454458880,2018-07-09 16:30:00,2018-07-09 18:30:00 | |
| 1016185655884546048,2018-07-09 13:01:00,2018-07-10 13:01:00 | |
| 1016187357069082624,2018-07-09 13:01:00,2018-07-10 13:01:00 | |
| 1016218802752147456,2018-07-09 15:10:00,2018-07-10 15:10:00 | |
| 1105316129889308672,2019-03-12 14:20:00,2019-03-18 18:50:00 | |
| 1108733876597383168,2019-03-22 14:20:00,2019-03-27 22:00:00 | |
| 1108735447938850816,2019-03-22 14:20:00,2019-03-22 18:00:00 | |
| 1115179055259009024,2019-04-09 16:30:00,2019-04-09 21:00:00 | |
| 1115520743819132928,2019-04-09 16:30:00,2019-04-16 20:00:00 | |
| 1118882733861498880,2019-04-19 14:25:00,2019-04-19 18:25:00 | |
| 1118888277519233024,2019-04-19 14:25:00,2019-04-23 23:59:00 | |
| 1122410549420965888,2019-04-30 14:25:00,2019-04-30 18:20:00 | |
| 1122412086620798976,2019-04-30 14:20:00,2019-05-21 23:30:00 | |
| 1128507571338506240,2019-05-17 14:30:00,2019-05-17 18:20:00 | |
| 1128508464570068992,2019-05-17 14:30:00,2019-05-21 23:59:00 | |
| 1133261261408595968,2019-05-28 16:30:00,2019-05-29 21:00:00 | |
| 1144460915295084544,2019-06-28 14:25:00,2019-06-28 18:20:00 | |
| 1145887384500133888,2019-07-02 14:25:00,2019-07-02 18:20:00 | |
| 1232446061776384000,2020-02-26 08:10:00,2020-02-26 09:20:00 | |
| 1232450180075401216,2020-02-26 08:30:00,2020-02-28 22:59:00 | |
| 1232551566385524736,2020-02-26 14:30:00,2020-02-26 16:35:00 | |
| 1234306732952563712,2020-03-02 10:35:00,2020-03-06 23:59:00 | |
| 1235077330007928832,2020-03-04 14:35:00,2020-03-04 15:00:00 | |
| 1235734009674498048,2020-03-06 10:20:00,2020-03-06 10:50:00 | |
| 1237402183809769472,2020-03-11 08:10:00,2020-03-13 23:59:00 | |
| 1238279381844369408,2020-03-13 10:10:00,2020-03-13 10:40:00 | |
| 1239896988963971072,2020-03-18 08:00:00,2020-03-18 08:25:00 | |
| 1240143666019180544,2020-03-18 14:30:00,2020-03-18 14:50:00 | |
| 1240807393219452928,2020-03-20 10:00:00,2020-03-20 10:30:00 | |
| 1242419776673161216,2020-03-25 14:20:00,2020-03-25 14:50:00 | |
| 1242421576079908864,2020-03-25 07:55:00,2020-03-25 08:25:00 | |
| 1243151147301662720,2020-03-27 10:10:00,2020-03-27 10:40:00 | |
| 1244974714457047040,2020-04-01 08:05:00,2020-04-01 08:35:00 | |
| 1244977488850731008,2020-04-01 14:30:00,2020-04-01 18:00:00 | |
| 1245890139478732800,2020-04-03 10:00:00,2020-04-03 21:00:00 | |
| 1247476136830451712,2020-04-08 08:46:00,2020-04-21 23:59:00 | |
| 1247476971681497088,2020-04-08 14:30:00,2020-04-15 23:59:00 | |
| 1248419538560266240,2020-04-10 10:00:00,2020-04-10 10:30:00 | |
| 1249907919467229184,2020-04-15 08:00:00,2020-04-15 08:30:00 | |
| 1249908908521861120,2020-04-15 14:20:00,2020-04-15 14:59:00 | |
| 1250954922318249984,2020-04-17 10:00:00,2020-04-17 10:30:00 | |
| 1252210001813848064,2020-04-22 08:00:00,2020-04-22 08:30:00 | |
| 1252212366965096448,2020-04-22 14:20:00,2020-04-22 14:50:00 | |
| 1253324461270814720,2020-04-24 10:00:00,2020-04-24 10:30:00 | |
| 1255081060125560832,2020-04-29 08:00:00,2020-04-29 08:30:00 | |
| 1257873256523853824,2020-05-06 14:20:00,2020-05-06 14:50:00 | |
| 1258364358007812096,2020-05-08 10:00:00,2020-05-08 10:40:00 | |
| 1260195122915815424,2020-05-13 08:00:00,2020-05-13 08:30:00 | |
| 1260196457635622912,2020-05-13 14:30:00,2020-05-13 15:00:00 | |
| 1261091012639801344,2020-05-15 10:00:00,2020-05-15 10:30:00 | |
| 1263632746062102528,2020-05-22 10:00:00,2020-05-22 10:30:00 | |
| 1263645205724479488,2020-05-22 10:30:00,2020-05-27 23:59:00 | |
| 1270010737840013312,2020-06-08 23:10:00,2020-06-09 23:09:00 | |
| 1270267114047062016,2020-06-10 20:00:00,2020-06-10 20:30:00 | |
| 1270501458883829760,2020-06-10 08:10:00,2020-06-14 23:59:00 | |
| 1270541288384675840,2020-06-10 14:20:00,2020-06-10 14:55:00 | |
| 1271109536079593472,2020-06-12 13:45:00,2020-06-12 23:30:00 | |
| 1271249795002064896,2020-06-12 10:00:00,2020-06-12 10:35:00 | |
| 1271313242691649536,2020-06-12 20:30:00,2020-06-12 20:45:00 | |
| 1271699412525170688,2020-06-13 20:40:00,2020-06-13 20:48:00 | |
| 1272098303586254848,2020-06-17 16:00:00,2020-06-17 18:03:00 | |
| 1273070032043302912,2020-06-17 09:50:00,2020-06-17 11:50:00 | |
| 1273165862045663232,2020-06-17 16:10:00,2020-06-17 19:10:00 | |
| 1273789270442102784,2020-06-19 10:10:00,2020-06-26 23:59:00 | |
| 1273795352690421760,2020-06-19 10:30:00,2020-06-19 12:30:00 | |
| 1274184861798092800,2020-06-21 09:30:00,2020-06-21 10:20:00 | |
| 1275577513995128832,2020-06-24 08:40:00,2020-06-24 10:40:00 | |
| 1275675706669912064,2020-06-24 15:00:00,2020-06-24 17:20:00 | |
| 1276680611657883648,2020-06-27 14:00:00,2020-06-27 16:00:00 | |
| 1348435111931375616,2021-01-11 09:20:00,2021-01-11 11:20:00 | |
| 1424768327225798656,2021-08-10 00:22:00,2021-10-01 02:22:00 | |
| 1464947132608610304,2021-11-29 08:00:00,2021-12-30 21:00:00 | |
| 1537324416932503552,, | |
| 1537413131210059776,2022-06-16 20:32:00,2022-06-16 23:59:00 | |
| 1537423255106473984,, | |
| 1537439023789498368,2022-06-16 22:20:00,2022-06-17 09:57:00 | |
| 1537623612218667008,2022-06-17 10:32:00,2022-06-17 10:40:00 | |
| 1538034494216073216,2022-06-18 13:45:00,2022-06-18 13:50:00 | |
| 1538044512390868992,2022-06-18 14:50:00,2022-06-18 15:00:00 | |
| 1538045488640290816,2022-06-18 15:10:00,2022-06-18 15:30:00 | |
| 1538176121819623424,, | |
| 1539236820289318912,2022-06-22 09:25:00,2022-06-22 10:45:00 | |
| 1559462477116006400,2022-08-16 21:30:00,2022-08-16 22:00:00 | |
| 1559470032605208576,, | |
| 1559743437250277376,2022-08-17 21:30:00,2022-08-17 22:00:00 | |
| 1560092346174713856,2022-08-18 13:40:00,2022-08-18 15:00:00 | |
| 1589529295796592640,, | |
| 1589529595236347904,2022-11-08 08:30:00,2022-11-15 23:59:00 | |
| 985799818887946240,2018-04-16 16:37:00,2018-04-17 16:37:00 | |
| 998452521230843904,2018-05-21 14:36:00,2018-05-21 22:25:00 | |
| 1074637060329320448,2019-01-02 10:25:00,2019-01-02 11:55:00 | |
| 1099919740195385344,2019-02-25 14:30:00,2019-02-26 14:30:00 | |
| 1133262333191680000,2019-05-28 16:30:00,2019-06-04 23:59:00 | |
| 1144463489695965184,2019-06-28 14:25:00,2019-07-07 23:59:00 | |
| 1235937253801623552,2020-03-06 22:35:00,2020-03-13 23:59:00 | |
| 1255081694946054144,2020-04-29 14:20:00,2020-04-29 14:50:00 | |
| 1255360149272424448,2020-04-29 14:30:00,2020-04-30 23:59:00 | |
| 1257693682431250432,2020-05-06 08:00:00,2020-05-06 08:30:00 | |
| 1257694579508989952,2020-05-06 08:00:00,2020-05-07 23:59:00 | |
| 1257872522801664000,2020-05-06 14:30:00,2020-05-10 23:59:00 | |
| 1261092347279917056,2020-05-15 10:15:00,2020-05-17 23:59:00 | |
| 1262734390414630912,2020-05-19 14:20:00,2020-05-19 14:50:00 | |
| 1262735363962912768,2020-05-20 14:20:00,2020-05-20 14:50:00 | |
| 1262735843090849792,2020-05-20 08:00:00,2020-05-20 08:30:00 | |
| 1270340732798033920,2020-06-10 08:00:00,2020-06-10 08:30:00 | |
| 1270542728385708032,2020-06-10 14:50:00,2020-06-16 23:59:00 | |
| 1271250705283465216,2020-06-12 10:30:00,2020-06-16 23:59:00 | |
| 1272929794427904000,2020-06-17 16:00:00,2020-06-17 18:03:00 | |
| 1273792881964347392,2020-06-19 10:40:00,2020-06-26 23:59:00 | |
| 1274273046465073152,2020-06-21 10:20:00,2020-06-21 11:10:00 | |
| 1407933648872443904,2021-06-24 13:27:00,2021-06-24 15:27:00 | |
| 1421669315861377024,2016-01-01 08:00:00,2038-01-18 08:00:00 | |