Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▾ Users
DWITE '11 R4 #1 - Crossword Count DWITE 5 54.8% 16
COCI '14 Contest 6 #1 Paprika COCI 3p 54.8% 85
JOI '16 Final P2 - Semiexpress JOI 12 54.8% 17
UCC Coding Competition '21 P1 - Counterfeit Detection Uncategorized 3p 54.7% 408
WCIPEG 2018 ECOO Qualifier P1 - Bincent's Billows ECOO 3 54.7% 107
WC '17 Finals S1 - An Interspecific Army Woburn Challenge 5p 54.7% 206
PEG Test '14 - Water Uncategorized 3 54.6% 870
DWITE '10 R3 #2 - Unit rectangles DWITE 5 54.5% 52
CCO '00 P3 - The Game Of 31 CCO 15 54.5% 11
COCI '20 Contest 2 #5 Svjetlo COCI 25p 54.5% 11
ICPC NWERC 2011 C - Movie Collection ICPC 10 54.5% 7
BlueBook - Digits and Sums BlueBook 3 54.5% 446
DMOPC '16 Contest 3 P1 - Leading Basic Shots DMOPC 3 54.5% 422
QCC P4 - Genetic Sequencing Uncategorized 5p 54.4% 51
BlueBook - Times Tables BlueBook 3 54.3% 1481
CCC '17 J2 - Shifty Sum CCC 3 54.3% 4571
COCI '11 Contest 1 #1 Jabuke COCI 5p 54.3% 37
MWC '15 #2 P1: Symmetry MWC 3 54.3% 46
COCI '12 Contest 3 #1 Sahovnica COCI 3 54.3% 46
COCI '16 Contest 3 #3 Kroničan COCI 10p 54.2% 49
DMOPC '14 Contest 1 P2 - Tiles DMOPC 3p 54.2% 1271
DWITE '11 R3 #4 - ABCA Maze DWITE 7 54.1% 73
PEG Test '11 - Cyclopian Puzzle Uncategorized 10 54.1% 352
QCC P0 - Thermometer Uncategorized 3 54.1% 165
Joshua Needs Help Uncategorized 10 54.1% 40
UCC Coding Competition '20 P2 - Optimal Skiing Uncategorized 3 54.0% 293
COCI '07 Contest 6 #1 Parking COCI 5 54.0% 282
Mock CCC '20 Contest 2 S1 - Arithmetic Hybercube Mock CCC 3p 54.0% 401
ICPC NEERC 2010 A - Alignment of Code ICPC 7 54.0% 21
Educational DP Contest AtCoder I - Coins Uncategorized 10 54.0% 339
Valentine's Day '15 P2 - Simon and Marcy Seasonal 7p 53.9% 665
Educational DP Contest AtCoder K - Stones Uncategorized 10 53.9% 435
Wesley's Anger Contest 3 Problem 1 - Snow Day Predictor WAC 3 53.8% 334
COCI '09 Contest 4 #2 Planina COCI 5 53.8% 137
COCI '10 Contest 2 #6 Crni COCI 12p 53.8% 6
Baltic OI '10 P2 - Lego Baltic OI 12p 53.8% 4
ACM U of T Tryouts C0 B - Interleaving Leaves ICPC 5 53.8% 681
CCC '21 J1 - Boiling Water CCC 3p 53.8% 3149
WC '17 Contest 4 J2 - Anger Management Woburn Challenge 3 53.8% 97
UCC Coding Competition '20 P5 - Public Transport Uncategorized 7p 53.8% 164
Double Doors Regional P1 - Tudor Gets a Goat Uncategorized 3 53.7% 292
Mock DWITE '09 P3 - Trailing Bears! Uncategorized 7 53.7% 52
CCC '10 S2 - Huffman Encoding CCC 5 53.6% 1571
IOI '04 P4 - Phidias IOI 10p 53.5% 883
CCC '23 J2 - Chili Peppers CCC 3p 53.5% 1620
COCI '17 Contest 3 #4 Portal COCI 12p 53.4% 16
DWITE '07 R5 #4 - Train ride DWITE 7 53.4% 37
ECOO '17 R2 P1 - Wizard's Windows ECOO 5p 53.4% 66
BlueBook - Voting BlueBook 3 53.4% 478
CCC '18 J2 - Occupy parking CCC 3 53.4% 5644