Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▴ Users
DMOPC '20 Contest 4 P1 - Missing Numbers DMOPC 5p 14.4% 379
DMOPC '21 Contest 6 P3 - An Art Problem DMOPC 10p 21.9% 249
Another Contest 6 Problem 9 - Obligatory Wood IV Problem ACC 0p 100.0% 1616
COCI '20 Contest 6 #1 Bold COCI 5p 67.7% 163
COCI '20 Contest 6 #2 Alias COCI 10p 42.3% 149
COCI '20 Contest 6 #3 Anagramistica COCI 12p 44.6% 91
COCI '20 Contest 6 #4 Geometrija COCI 25p 10.2% 8
COCI '20 Contest 6 #5 Index COCI 15p 50.0% 105
An Animal Contest 1 P2 - Alpaca Racing AAC 5p 8.1% 548
An Animal Contest 1 P3 - Happy Alpacas AAC 7p 20.6% 486
An Animal Contest 1 P5 - Odd Alpacas AAC 12p 27.6% 107
An Animal Contest 1 P1 - Alpaca Shapes AAC 3p 39.9% 2409
An Animal Contest 1 P6 - Alpaca Distancing AAC 12p 20.1% 108
An Animal Contest 2 P0 - Koala Matchmaking AAC 3 50.0% 1177
An Animal Contest 1 P4 - Alpaca Arrays AAC 10p 12.4% 245
Another Contest 6 Problem 12 - A Pretty Standard Problem Involving Judge Kirito ACC 0p 6.9% 13
DMOPC '20 Contest 6 P1 - Tug of War DMOPC 7p 14.8% 175
Canada Day Contest 2021 - 0-1 Seasonal 20p 48.7% 61
DMOPC '20 Contest 5 P1 - Home Row DMOPC 3 34.9% 447
SAC '21 Code Challenge P1 - Shrinkage SAC Coding Challenge 3 51.2% 492
SAC '21 Code Challenge P2 - Littering SAC Coding Challenge 5p 36.0% 262
COCI '20 Contest 4 #1 Pizza COCI 5p 62.8% 151
Canada Day Contest 2021 - Bob and Canada Seasonal 7p 34.5% 214
Canada Day Contest 2021 - Fine Art Seasonal 7 26.9% 127
Canada Day Contest 2021 - CCC Bad Haha Seasonal 12 36.2% 248
Canada Day Contest 2021 - Starfall Seasonal 15 32.4% 112
SAC '21 Code Challenge P5 - Friends of Friends SAC Coding Challenge 7p 22.2% 255
SAC '21 Code Challenge P4 - Averaging Averages SAC Coding Challenge 5p 26.8% 203
An Animal Contest 2 P5 - Koala Carnival AAC 15p 34.8% 98
An Animal Contest 2 P6 - Koala Transport System AAC 17p 22.2% 61
An Animal Contest 2 P2 - Koala Party AAC 5p 16.5% 292
SAC '21 Code Challenge P3 - DeMello's Replacement SAC Coding Challenge 5 19.5% 201
Marcus Approximation Uncategorized 12p 33.3% 43
An Animal Contest 2 P4 - Koala Gambling AAC 12 19.8% 197
An Animal Contest 2 P1 - Koala Konundrum AAC 5 44.5% 491
Koala Ball Uncategorized 12p 32.2% 14
DMOPC '20 Contest 5 P6 - Top Row DMOPC 35p 3.1% 5
DMOPC '20 Contest 5 P5 - Slacking Off Again DMOPC 20p 17.6% 32
DMOPC '20 Contest 5 P4 - Slacking Off DMOPC 15p 13.5% 82
CPC '21 Contest 1 P5 - AQT and Modern Art Uncategorized 15p 15.8% 45
QCC P2 - Online School Uncategorized 5p 31.3% 83
An Animal Contest 2 P3 - Koala Balloons AAC 12p 15.2% 180
ECOO '21 P1 - Many Messages ECOO 3p 28.9% 451
ECOO '21 P2 - DNA Derren ECOO 3p 58.7% 330
ECOO '21 P3 - Quintessential Questions ECOO 3p 63.9% 225
ECOO '21 P4 - Chris' Candy ECOO 7p 23.6% 109
ECOO '21 P5 - Waldwick's Walk ECOO 17p 21.6% 23
ECOO '21 P6 - Problematic Pathways ECOO 30p 9.2% 4
Baltic OI '13 P1 - Ball Machine Baltic OI 15p 23.4% 14
BSSPC '21 S4 - Child Prodigy Chadstin Uncategorized 17p 6.7% 25