problem_set_id,start_at,end_at
1244561323648753664,2020-03-30 17:43:00,2020-04-06 10:34:00
1246246888673030144,2020-04-04 09:20:00,2020-04-19 09:20:00
1246248290589782016,2020-04-04 09:27:00,2020-04-12 19:44:00
1246338524400992256,2020-04-04 15:26:00,2020-04-19 22:26:00
1246339020071256064,2020-04-04 15:28:00,2020-04-12 19:47:00
1246339521315516416,2020-04-04 15:30:00,2020-04-12 19:50:00
1249303380251000832,2020-04-12 19:46:00,2020-04-26 22:30:00
1249304252288512000,2020-04-12 19:50:00,2020-05-10 22:30:00
1249306241806516224,2020-04-12 19:58:00,2020-04-26 22:30:00
1249306759505264640,2020-04-12 20:00:00,2020-05-10 22:30:00
1257489930319368192,2020-05-05 09:57:00,2020-05-17 22:30:00
1257490629061079040,2020-05-05 10:00:00,2020-05-17 22:30:00
1260356229089435648,2020-05-13 07:46:00,2020-05-31 22:00:00
1260356929492066304,2020-05-13 07:50:00,2020-05-31 22:00:00
1264754916649689088,2020-05-25 11:06:00,2020-06-07 22:00:00
1264755584118644736,2020-05-25 11:09:00,2020-06-07 22:00:00
1266185220581056512,2020-05-29 10:30:00,2020-05-30 10:00:00
1267007907897360384,2020-06-01 23:30:00,2020-06-02 01:30:00
1267271817657401344,2020-06-01 10:00:00,2020-06-01 19:00:00
1267342374746800128,2020-06-01 14:28:00,2020-06-01 16:28:00
1267369635646619648,2020-06-01 17:00:00,2020-06-01 23:00:00
1267987607771758592,2020-06-03 09:41:00,2020-06-03 11:30:00
1269794655513698304,2020-06-08 10:45:00,2020-06-08 16:45:00
1270132891290091520,2020-06-09 13:00:00,2020-06-09 15:30:00
1272732786350014464,2020-06-21 09:00:00,2020-06-21 11:00:00
1275692052234838016,2020-06-27 09:00:00,2020-06-27 11:20:00
1386969720561979392,2021-05-18 13:50:00,2021-05-18 15:50:00
1387758522746458112,2021-04-29 21:18:00,2021-05-09 00:00:00
1394622509615566848,2021-06-21 10:00:00,2021-06-21 11:30:00
1397438107929010176,2021-05-26 14:21:00,2021-06-07 00:00:00
1397438769681129472,2021-05-26 14:24:00,2021-06-11 00:00:00
1400010496324444160,2021-06-22 13:40:00,2021-06-22 15:10:00
1400269004416548864,2021-09-01 09:00:00,2021-09-01 11:30:00
1400386932214353920,2021-06-03 17:39:00,2021-06-14 00:00:00
1408319357151993856,2021-06-25 15:00:00,2021-07-31 17:00:00
1409767802298978304,2021-06-29 14:55:00,2021-06-29 16:55:00
1410120954119692288,2021-06-30 14:19:00,2021-06-30 16:19:00
1421471406062661632,2016-01-01 08:00:00,2038-01-18 08:00:00
1421479180813299712,2016-01-01 08:00:00,2038-01-18 08:00:00
1421678093612707840,2016-01-01 08:00:00,2038-01-18 08:00:00
1435863447750422528,2021-09-09 15:09:00,2021-12-31 23:09:00
1445293095265144832,2021-10-05 16:08:00,2022-01-16 20:00:00
1450083480125698048,2021-10-25 09:30:00,2021-10-25 11:30:00
1450684948893921280,2021-10-24 08:00:00,2021-10-25 00:00:00
1451864569182539776,2021-10-24 08:00:00,2021-12-25 00:00:00
1453601858521276416,2021-10-31 08:23:00,2021-11-14 10:23:00
1457265024895680512,2021-11-08 08:00:00,2021-12-27 18:00:00
1457343952301654016,2021-11-08 08:00:00,2021-12-09 15:40:00
1458701347926839296,2021-11-11 15:40:00,2021-12-31 15:39:00
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
1467868690545266688,2021-12-06 17:00:00,2021-12-08 17:00:00
1467873990507827200,2021-12-06 23:00:00,2021-12-10 17:00:00
1467880420786900992,,
1467881599596040192,2021-12-06 23:39:00,2021-12-07 01:39:00
1469164972006068224,,
1469167907616215040,2021-12-10 12:51:00,2021-12-12 14:00:00
1470651812726583296,2021-12-16 12:55:00,2021-12-16 14:00:00
1471327460990267392,2021-12-17 13:00:00,2021-12-18 13:00:00
1472075537194221568,2021-12-19 18:20:00,2021-12-20 18:20:00
1472076220111822848,2021-12-18 13:30:00,2021-12-19 13:30:00
1473228293831012352,2021-12-21 17:50:00,2021-12-22 04:59:00
1508429101059485696,2022-03-28 21:00:00,2022-05-15 23:59:00
1508757692213440512,2022-03-29 18:46:00,2022-05-15 23:59:00
1513413809572814848,2022-04-11 15:07:00,2022-04-26 00:00:00
1514782325505159168,2022-04-15 12:46:00,2022-05-15 23:59:00
1514784087793639424,2022-04-15 12:00:00,2022-05-15 23:59:00
1516708097752985600,2022-04-20 17:17:00,2022-04-30 00:00:00
1516708988325359616,2022-04-20 17:21:00,2022-05-08 00:00:00
1517320050179289088,2022-04-22 09:50:00,2022-05-15 23:59:00
1517327598114549760,2022-04-22 10:20:00,2022-05-15 23:59:00
1519862613259857920,2022-04-29 10:13:00,2022-05-29 10:13:00
1520938544074420224,2022-05-02 09:28:00,2022-05-23 00:00:00
1527834197358989312,2022-05-23 10:30:00,2022-05-23 11:30:00
1528903190077427712,2022-05-25 18:30:00,2022-05-25 20:00:00
1529388221103325184,2022-05-27 10:00:00,2022-05-28 23:50:00
1530733611396354048,2022-05-29 20:00:00,2022-05-29 21:00:00
1530828154431049728,2022-05-30 18:30:00,2022-05-30 20:30:00
1542333919667146752,2022-06-30 10:26:00,2022-06-30 12:26:00
1565255445390622720,2022-09-02 10:20:00,2022-09-02 10:30:00
1578728219574243328,2022-10-22 16:30:00,2022-10-22 18:10:00
1580726411874529280,2022-10-14 10:40:00,2022-10-14 23:03:00
1580727068702539776,2022-10-14 10:40:00,2022-10-16 11:06:00
1581997267066028032,2022-10-17 21:13:00,2022-10-17 23:13:00
1584551502190354432,2022-10-24 22:24:00,2022-10-25 00:24:00
1587376123481194496,,
1587379049129869312,2022-11-01 17:40:00,2022-11-08 00:00:00
1587379500936101888,2022-11-01 17:42:00,2022-11-10 00:00:00
1587674387757686784,2022-11-02 13:13:00,2022-11-13 23:55:00
1588087231561101312,2022-11-07 10:00:00,2022-11-07 10:55:00
1588442519174676480,2022-11-04 16:06:00,2022-11-04 18:06:00
1589452585390600192,2022-11-07 11:05:00,2022-11-07 11:50:00
1589513706835308544,2022-11-07 15:02:00,2022-11-07 17:02:00
1589515705974816768,2022-11-07 15:10:00,2022-11-07 17:10:00
1590651663587860480,2022-11-11 10:15:00,2022-11-11 10:28:00