| problem_set_id,start_at,end_at | |
| 1054999874246901760,2018-10-24 15:34:00,2019-01-01 13:28:00 | |
| 1080651514553982976,2019-01-15 15:00:00,2019-01-15 17:00:00 | |
| 1080660875812667392,2019-01-03 11:02:00,2019-01-04 16:40:00 | |
| 1108617006720442368,2019-03-21 15:00:00,2019-03-21 16:30:00 | |
| 1117090735908073472,2019-04-13 08:00:00,2019-04-21 23:59:00 | |
| 1122128393238953984,2019-04-27 21:20:00,2019-06-24 11:20:00 | |
| 1128202791758962688,2019-05-14 19:31:00,2019-05-14 20:49:00 | |
| 1137887944489263104,2019-06-11 16:45:00,2019-06-11 17:26:00 | |
| 1138366940645646336,2019-06-11 16:44:00,2019-07-01 16:44:00 | |
| 1140775819555856384,2019-06-18 11:10:00,2019-06-18 12:00:00 | |
| 1140878669770350592,2019-07-19 15:06:00,2019-07-19 15:06:00 | |
| 1148598355294810112,2019-07-12 15:00:00,2019-07-12 17:05:00 | |
| 1166524831450746880,2019-08-28 09:35:00,2019-12-11 18:35:00 | |
| 1170995113216782336,2019-09-09 17:37:00,2019-10-21 20:40:00 | |
| 1172039408795529216,2019-09-12 16:30:00,2019-09-12 18:30:00 | |
| 1208240454100262912,2020-01-01 08:00:00,2020-01-01 10:00:00 | |
| 1209280437376466944,2019-12-24 09:15:00,2019-12-30 19:53:00 | |
| 1211617470409293824,2019-12-31 08:30:00,2019-12-31 10:30:00 | |
| 1252500288281694208,2020-04-21 16:00:00,2020-04-21 17:40:00 | |
| 1260511848450732032,2020-05-14 09:00:00,2020-05-14 11:00:00 | |
| 1272772195166380032,2020-06-16 20:10:00,2020-06-16 20:20:00 | |
| 1272787647015870464,2020-06-19 09:30:00,2020-06-19 10:00:00 | |
| 1272901397618278400,2020-06-16 22:37:00,2020-06-17 20:37:00 | |
| 1282113868289085440,2020-07-12 14:00:00,2020-07-12 15:00:00 | |
| 1300698385674227712,2020-09-01 15:33:00,2021-01-11 10:48:00 | |
| 1320915668938473472,2020-10-27 14:20:00,2020-10-27 15:20:00 | |
| 1335568432261316608,2020-12-07 16:45:00,2020-12-07 16:55:00 | |
| 1338316775659696128,2020-12-14 16:45:00,2021-11-23 23:55:00 | |
| 1343379675635924992,2020-12-28 16:45:00,2020-12-28 16:55:00 | |
| 1345302408007602176,2021-01-06 08:00:00,2021-01-06 10:00:00 | |
| 1345894847659450368,2021-01-04 16:30:00,2021-01-04 16:55:00 | |
| 1345922688560209920,2021-01-24 14:00:00,2021-01-24 16:00:00 | |
| 1348092608257196032,2021-01-11 19:00:00,2021-01-11 21:00:00 | |
| 1348246377449369600,2021-01-11 16:24:00,2021-01-11 23:59:00 | |
| 1349912226263048192,2021-01-24 14:00:00,2021-01-24 16:00:00 | |
| 1370277635682525184,2021-03-13 08:10:00,2021-03-13 10:10:00 | |
| 1372530660195856384,2021-03-18 20:49:00,2021-06-30 07:49:00 | |
| 1375237668446736384,2021-03-26 08:05:00,2021-04-01 23:58:00 | |
| 1375273494501199872,2021-03-26 10:27:00,2021-03-29 07:00:00 | |
| 1375296886092664832,2021-03-26 12:01:00,2021-03-29 07:01:00 | |
| 1380327560454373376,2021-04-09 09:10:00,2021-04-15 23:59:00 | |
| 1387591722582855680,2021-04-29 10:15:00,2021-05-13 23:15:00 | |
| 1392376340881211392,2021-05-12 19:00:00,2021-05-12 21:00:00 | |
| 1392400055211757568,2021-05-12 19:00:00,2021-05-12 21:00:00 | |
| 1392834870457368576,2021-05-13 21:31:00,2021-05-19 23:31:00 | |
| 1407939705585831936,2021-06-24 13:52:00,2021-07-23 15:52:00 | |
| 1408327892648714240,2021-07-09 15:00:00,2021-07-09 17:00:00 | |
| 1410910253006524416,2021-07-02 20:15:00,2021-07-02 20:30:00 | |
| 1411955685996867584,2021-07-06 10:30:00,2021-07-06 12:30:00 | |
| 1413394443870957568,2021-07-09 15:10:00,2021-07-09 17:10:00 | |
| 1421679087558889472,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1423258456005095424,2021-08-09 19:10:00,2021-08-09 22:20:00 | |
| 1423259202230431744,2021-08-09 19:25:00,2021-08-09 22:25:00 | |
| 1423259433785438208,2021-08-12 19:27:00,2021-08-12 23:27:00 | |
| 1423260006882553856,2021-08-12 19:29:00,2021-08-12 23:29:00 | |
| 1423260296260104192,2021-08-10 20:00:00,2021-08-10 22:00:00 | |
| 1423260560497127424,2021-08-10 20:00:00,2021-08-10 22:00:00 | |
| 1423260616541351936,2021-08-11 20:00:00,2021-08-11 22:00:00 | |
| 1423260737903603712,2021-08-11 20:00:00,2021-08-11 22:00:00 | |
| 1423260886037966848,2021-08-11 20:00:00,2021-08-11 22:00:00 | |
| 1437741357580341248,2021-09-24 15:00:00,2021-09-24 15:04:00 | |
| 1441299561863680000,2021-09-25 09:30:00,2021-09-25 12:00:00 | |
| 1441301312964251648,2021-09-24 16:20:00,2021-09-24 18:20:00 | |
| 1455453092611665920,2021-11-09 14:50:00,2021-11-09 15:05:00 | |
| 1457977062950821888,2021-11-16 14:50:00,2021-11-16 15:05:00 | |
| 1471146768499093504,2021-12-16 10:00:00,2021-12-23 19:00:00 | |
| 1473508537158742016,2022-01-07 14:00:00,2022-01-07 16:00:00 | |
| 1473520656679215104,2022-01-07 14:00:00,2022-01-07 16:00:00 | |
| 1495563602047086592,, | |
| 1495571797432401920,2022-02-21 18:30:00,2022-02-21 20:30:00 | |
| 1496657900307234816,2022-02-24 09:26:00,2022-06-02 23:26:00 | |
| 1499266304597692416,2022-03-03 14:11:00,2022-03-03 15:45:00 | |
| 1499295708393422848,2022-03-03 17:18:00,2022-03-03 17:30:00 | |
| 1518470786590633984,2022-04-25 14:03:00,2022-04-30 23:26:00 | |
| 1526020628354859008,2022-05-16 10:03:00,2022-06-22 22:03:00 | |
| 1529606109877751808,2022-05-26 07:50:00,2022-06-22 09:50:00 | |
| 1536856984082173952,2022-06-16 20:00:00,2022-06-16 20:30:00 | |
| 1536861009749983232,2022-06-20 20:30:00,2022-06-20 21:00:00 | |
| 1537044708273676288,2022-06-15 20:15:00,2022-06-15 20:30:00 | |
| 1537057254372261888,2022-06-15 21:10:00,2022-06-15 21:20:00 | |
| 1538392475004813312,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1538543480887562240,2022-06-19 23:24:00,2022-09-20 23:59:00 | |
| 1538705099571576832,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1538705808773869568,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1539106556535894016,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1539169303181119488,2022-06-24 14:00:00,2022-06-24 15:30:00 | |
| 1539171455551131648,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1539257681322958848,2022-06-23 09:00:00,2022-06-23 11:00:00 | |
| 1557897694906462208,2022-08-18 14:00:00,2022-08-18 15:30:00 | |
| 1557901482560118784,2022-08-16 14:00:00,2022-08-16 15:30:00 | |
| 1562589476076548096,2022-08-25 07:54:00,2022-08-31 21:54:00 | |
| 1575364027206909952,2022-09-29 14:30:00,2022-09-29 16:30:00 | |
| 1580114009827049472,, | |
| 1580180159982202880,2022-10-12 20:53:00,2022-10-13 07:53:00 | |
| 1581138774964559872,2022-10-15 12:23:00,2022-10-15 14:23:00 | |
| 1581906259506618368,, | |
| 1581910052231176192,2022-10-17 15:28:00,2022-12-31 23:59:00 | |
| 1584196247418187776,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1589519989751705600,2022-11-07 15:26:00,2023-08-31 17:26:00 | |
| 1589591260229300224,2022-11-07 20:10:00,2022-11-20 22:10:00 | |
| 1057524724987621376,2018-10-31 14:48:00,2019-01-01 09:25:00 | |
| 1062007119301615616,2018-11-13 11:25:00,2018-11-13 11:27:00 | |
| 1062008065649819648,2018-11-13 11:00:00,2018-11-13 11:30:00 | |
| 1062177176971419648,2018-11-13 11:25:00,2018-11-13 11:27:00 | |
| 1062872606428520448,2018-11-15 08:28:00,2019-01-01 18:30:00 | |
| 1065416294174195712,2018-11-22 09:26:00,2019-01-01 17:25:00 | |
| 1067267658508853248,2018-11-27 12:05:00,2018-11-28 12:20:00 | |
| 1067268055810105344,2018-11-27 12:05:00,2018-11-28 12:20:00 | |
| 1068073397120851968,2018-11-29 17:23:00,2019-01-01 10:26:00 | |
| 1115054388233846784,2019-04-09 10:15:00,2019-04-09 11:45:00 | |
| 1115445181285089280,2019-04-10 02:40:00,2019-04-10 03:20:00 | |
| 1115446577761828864,2019-04-09 02:50:00,2019-04-10 03:10:00 | |
| 1125299207362887680,2019-05-07 10:15:00,2019-05-07 10:45:00 | |
| 1126377165808836608,2019-05-10 14:43:00,2019-05-10 16:43:00 | |
| 1178216522202238976,2019-09-30 08:05:00,2019-09-30 08:30:00 | |
| 1186956562469507072,2019-10-23 19:35:00,2019-10-23 21:35:00 | |
| 1186956648565993472,2019-10-23 19:34:00,2019-10-23 19:35:00 | |
| 1193480214396956672,2019-11-11 08:00:00,2019-11-11 09:00:00 | |
| 1193481402609733632,2019-11-11 08:00:00,2019-11-11 09:00:00 | |
| 1193815222936571904,2019-11-11 19:00:00,2019-11-11 20:20:00 | |
| 1264450808151621632,2020-05-25 00:00:00,2020-06-21 23:59:00 | |
| 1265192669770235904,2020-05-26 16:06:00,2020-05-26 20:06:00 | |
| 1272568504241012736,2020-06-19 10:05:00,2020-06-19 10:35:00 | |
| 1274201471573291008,2020-06-22 08:30:00,2020-06-22 10:10:00 | |
| 1280011962988924928,2020-07-06 14:30:00,2020-07-06 15:00:00 | |
| 1280378243403526144,2020-07-07 14:30:00,2020-07-07 16:30:00 | |
| 1315537429525749760,2020-10-12 16:45:00,2020-10-12 18:45:00 | |
| 1317725015019212800,2020-10-21 18:30:00,2020-10-21 19:30:00 | |
| 1318035984270430208,2020-10-19 16:45:00,2020-10-19 16:55:00 | |
| 1320910453891874816,2020-10-27 14:20:00,2020-10-27 15:20:00 | |
| 1321288861574455296,2020-11-02 16:45:00,2020-11-02 16:55:00 | |
| 1325672293914066944,2020-11-09 16:45:00,2020-11-09 16:55:00 | |
| 1325688022747013120,2020-11-09 16:00:00,2020-12-01 23:59:00 | |
| 1330724396095811584,2020-11-23 16:45:00,2020-11-23 16:55:00 | |
| 1333227470286794752,2020-11-30 16:45:00,2020-11-30 16:55:00 | |
| 1366560659448627200,2021-03-13 18:00:00,2021-03-13 20:43:00 | |
| 1372513337925857280,2021-03-18 19:39:00,2021-03-28 23:39:00 | |
| 1377457577114845184,2021-04-01 11:06:00,2021-04-08 23:58:00 | |
| 1382864823505489920,2021-04-16 09:13:00,2021-04-30 23:58:00 | |
| 1392306597256101888,2021-05-12 10:31:00,2021-05-31 23:31:00 | |
| 1392400603281461248,2021-05-12 19:00:00,2021-05-12 21:00:00 | |
| 1392748200504459264,2021-05-13 15:44:00,2021-05-14 17:44:00 | |
| 1405512900084539392,2021-06-17 21:08:00,2021-07-08 15:19:00 | |
| 1407230852619108352,2021-06-22 16:00:00,2021-06-22 17:15:00 | |
| 1407577084726263808,2021-06-23 13:45:00,2021-06-23 15:45:00 | |
| 1407844359920734208,2021-06-24 08:00:00,2021-06-24 09:30:00 | |
| 1408290325794492416,2021-06-25 13:05:00,2021-06-25 15:05:00 | |
| 1408615726840487936,2021-07-06 15:00:00,2021-07-06 17:00:00 | |
| 1409379261241806848,2021-06-28 13:08:00,2021-06-28 15:08:00 | |
| 1421472382753443840,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1421670444502446080,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1421672136762494976,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1435180147776901120,2021-09-23 18:30:00,2021-09-23 19:30:00 | |
| 1437712315376484352,2021-09-14 19:00:00,2021-09-14 21:00:00 | |
| 1442404250764652544,2021-09-27 16:49:00,2021-09-27 18:30:00 | |
| 1446278854692474880,2021-10-19 14:50:00,2021-10-19 16:50:00 | |
| 1447391006117990400,2021-10-11 10:40:00,2021-12-12 12:40:00 | |
| 1447393751235432448,2021-10-11 10:47:00,2021-12-12 12:47:00 | |
| 1452548089009946624,2021-10-26 14:55:00,2021-10-26 15:05:00 | |
| 1495551132939649024,2022-02-21 18:30:00,2022-02-21 19:30:00 | |
| 1497121361797750784,, | |
| 1497127500157460480,2022-02-27 20:30:00,2022-02-27 20:50:00 | |
| 1499197927078367232,2022-03-03 09:39:00,2022-03-10 08:28:00 | |
| 1501826065717325824,2022-03-10 15:43:00,2022-03-24 17:43:00 | |
| 1501910305641394176,2022-03-10 21:17:00,2022-03-10 23:17:00 | |
| 1503259493075578880,2022-03-14 14:39:00,2022-03-14 17:29:00 | |
| 1506788015794831360,, | |
| 1506791594144317440,2022-03-24 08:34:00,2022-03-24 23:59:00 | |
| 1509865331563204608,2022-04-01 20:06:00,2022-04-02 22:06:00 | |
| 1510239704422121472,2022-04-08 08:00:00,2022-04-08 10:00:00 | |
| 1511601392241807360,2022-04-06 15:30:00,2022-04-07 23:59:00 | |
| 1518108548477952000,2022-04-25 14:00:00,2022-04-25 16:30:00 | |
| 1518122639317737472,2022-04-25 19:00:00,2022-04-25 21:30:00 | |
| 1520740429476229120,2022-05-01 20:56:00,2022-05-01 21:01:00 | |
| 1520767726191214592,2022-05-01 21:09:00,2022-05-02 00:09:00 | |
| 1520933550415769600,2022-05-02 10:20:00,2022-05-02 12:09:00 | |
| 1522192196579766272,2022-05-08 20:00:00,2022-05-08 21:00:00 | |
| 1522414644818485248,2022-05-06 11:14:00,2022-05-06 13:14:00 | |
| 1522482367237849088,2022-05-06 15:43:00,2022-05-06 18:43:00 | |
| 1522565318671753216,2022-05-06 21:13:00,2022-05-06 23:13:00 | |
| 1523911340970897408,2022-05-10 14:21:00,2022-05-10 16:21:00 | |
| 1523912762164670464,2022-05-10 14:50:00,2022-05-10 23:30:00 | |
| 1526368233920450560,2022-05-29 09:04:00,2022-06-26 11:04:00 | |
| 1529990532909486080,, | |
| 1531905711280717824,2022-06-01 20:05:00,2022-06-01 22:05:00 | |
| 1539791482709073920,2022-07-02 10:20:00,2022-07-02 10:56:00 | |
| 1539792025326186496,2022-07-02 15:12:00,2022-07-02 15:45:00 | |
| 1539872518063247360,, | |
| 1567409186860634112,, | |
| 1570639714548121600,2022-09-18 08:10:00,2022-09-18 09:10:00 | |
| 1572392061066653696,, | |
| 1572416978738851840,2022-09-21 10:46:00,2022-10-07 12:46:00 | |
| 1578360956727775232,2022-10-07 20:25:00,2022-10-09 22:25:00 | |
| 1580504253130862592,2022-10-13 18:30:00,2022-10-20 21:05:00 | |
| 1580953005985619968,2022-10-15 00:04:00,2022-10-15 02:04:00 | |
| 1581105772129677312,2022-10-15 10:11:00,2022-10-15 12:11:00 | |
| 1581131224760188928,2022-10-15 11:53:00,2022-10-15 13:53:00 | |
| 1584160931097493504,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1584392972296658944,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1584402977200676864,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 1158547876863008768,2019-08-06 09:16:00,2019-08-08 11:16:00 | |
| 1180384555054157824,2019-10-05 15:26:00,2019-10-05 17:26:00 | |
| 1260105486457614336,2020-05-12 15:11:00,2020-05-14 01:11:00 | |
| 1266295313536475136,2020-05-30 14:00:00,2020-05-30 16:00:00 | |
| 1267695757995360256,2020-06-02 13:52:00,2020-06-02 16:52:00 | |
| 1270152839735459840,2020-06-09 08:36:00,2020-06-09 12:36:00 | |
| 1272532230637543424,2020-06-16 20:10:00,2020-06-16 20:20:00 | |
| 1272719108552712192,2020-06-16 10:33:00,2020-06-16 21:33:00 | |
| 1272764457807953920,2020-06-16 20:10:00,2020-06-16 20:20:00 | |
| 1275266593927929856,2020-06-23 11:16:00,2020-06-23 19:16:00 | |
| 1277800010267021312,2020-07-02 11:02:00,2020-07-02 13:02:00 | |
| 1326709457650601984,2020-11-14 08:30:00,2020-11-14 09:00:00 | |
| 1327240649386913792,2020-11-14 14:40:00,2020-11-14 16:10:00 | |
| 1328169522958061568,2020-11-16 15:20:00,2020-11-26 23:59:00 | |
| 1331422838958895104,2020-12-01 16:30:00,2020-12-01 18:30:00 | |
| 1331451697246810112,2020-12-01 16:30:00,2020-12-01 18:30:00 | |
| 1363733803850629120,2021-02-25 13:30:00,2021-02-25 13:50:00 | |
| 1377087187632955392,2021-03-31 10:35:00,2021-04-21 23:35:00 | |
| 1377089789267451904,2021-03-31 10:45:00,2021-04-26 23:45:00 | |
| 1386486110830460928,2021-04-26 09:03:00,2021-04-26 11:03:00 | |
| 1386969720561979392,2021-05-18 13:50:00,2021-05-18 15:50:00 | |
| 1397107547410878464,2021-07-12 00:00:00,2021-07-14 09:00:00 | |
| 1400717452382879744,2021-06-04 10:20:00,2021-06-04 12:20:00 | |
| 1400734534512189440,2021-06-08 12:30:00,2021-06-08 14:30:00 | |
| 1407933648872443904,2021-06-24 13:27:00,2021-06-24 15:27:00 | |
| 1414226308289871872,2021-07-12 00:00:00,2021-07-14 09:00:00 | |
| 1421669315861377024,2016-01-01 08:00:00,2038-01-18 08:00:00 | |
| 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 | |
| 1480016151522091008,2022-01-09 11:18:00,2022-01-09 13:18:00 | |
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