- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1125
- Length: 4 days and ~15 hours (start time: 2011-11-21 09:00:00; end time: 2011-11-25 23:59:00)
- Total problems: 33
- Total runs: 3906 (including 2005 ACs)
- Total users: 186
- Total institutions: 50
- Total countries: 18
- The Winner: jcfernandez
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1130
- Length: 2 days and 2 hours (start time: 2011-12-14 20:00:00; end time: 2011-12-16 22:00:00
- Total problems: 17
- Total runs: 1461 (including 756 ACs)
- Total users: 131
- Total institutions: 42
- Total countries: 15
- The Winner: Jorge_Tele
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1134
- Length: 12 hours (start time: 2012-03-05 10:00:00; end time: 2012-03-05 22:00:00)
- Total problems: 14
- Total runs: 423 (including 164 ACs)
- Total users: 89
- Total institutions: 28
- Total countries: 9
- The Winner: Manuelc11
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1169
- Length: 1 day (start time: 2012-06-01 14:00:00; end time: 2012-06-02 14:00:00)
- Total problems: 15
- Total runs: 1058 (including 311 ACs)
- Total users: 96
- Total institutions: 35
- Total countries: 16
- The Winner: jcfernandez
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1229
- Length: 7 days (start time: 2013-01-29 10:30:00; end time: 2013-02-05 10:30:00)
- Total problems: 17
- Total runs: 781 (including 323 ACs)
- Total users: 116
- Total institutions: 35
- Total countries: 10
- The Winner: Charlie
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1301
- Length: 10 days (start time: 2013-06-27 14:00:00; end time: 2013-07-07 14:00:00)
- Total problems: 30
- Total runs: 6045 (including 3090 ACs)
- Total users: 320
- Total institutions: 88
- Total countries: 41[/b]
- The Winner: AntonLunyov
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1365
- Length: 7 days (start time: 2014-07-11 14:00:00; end time: 2014-07-18 14:00:00)
- Total problems: 30
- Total runs: 6590 (including 3483 ACs)
- Total users: 343
- Total institutions: 110
- Total countries: 37
- The Winner: niquefaDiego
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1453
- Length: 10 days (start time: 2015-06-05 15:00:00; end time: 2015-06-15 15:00:00)
- Total problems: 30
- Total runs: 6714 (including 2242 ACs)
- Total users: 377
- Total institutions: 124
- Total countries: 40
- The Winner: cjtoribio
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1456
- Length: 10 days (start time: 2015-07-07 10:00:00; end time: 2015-07-17 10:00:00)
- Total problems: 30
- Total runs: 4019 (including 1204 ACs)
- Total users: 168
- Total institutions: 44
- Total countries: 21
- The Winner: MarX
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1494
- Length: 10 days (start time: 2016-07-10 16:00:00; end time: 2016-07-20 16:00:00)
- Total problems: 30
- Total runs: 5398 (including 2376 ACs)
- Total users: 299
- Total institutions: 97
- Total countries: 27
- The Winner: cjtoribio
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1571
- Length: 13 days and 7 hours (start time: 2017-06-05 09:00:00; end time: 2017-06-18 16:00:00)
- Total problems: 30
- Total runs: 8465 (including 2956 ACs)
- Total users: 379
- Total institutions: 110
- Total countries: 29
- The Winner: cjtoribio
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1669
- Length: 7 days (start time: 2018-10-30 16:00:00; end time: 2018-11-06 16:00:00)
- Total problems: 30
- Total runs: 4703 (including 2070 ACs)
- Total users: 230
- Total institutions: 57
- Total countries: 16
- The Winner: cjtoribio
- Statistics link: http://coj.uci.cu/contest/cstatistics.xhtml?cid=1700
- Length: 15 days (start time: 2019-06-05 10:00:00; end time: 2019-06-20 10:00:00)
- Total problems: 47
- Total runs: 10618 (including 4021 ACs)
- Total users: 433
- Total institutions: 142
- Total countries: 59
- The Winner: PikMike