Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points ▾ AC % Users
ECOO '20 P3 - Captcha Fun ECOO 7p 24.9% 103
UCC Coding Competition '20 P4 - Bubble Tea Uncategorized 7p 43.7% 222
UCC Coding Competition '20 P5 - Public Transport Uncategorized 7p 53.8% 163
Mathtermind Uncategorized 7 42.2% 9
CCO '04 P5 - Jengaism CCO 7 31.8% 116
COCI '15 Contest 7 #2 Prozor COCI 7p 37.9% 21
COCI '09 Contest 4 #3 IKS COCI 7 34.2% 68
ACM U of T Tryouts C1 C - Foxhole ICPC 7 31.5% 127
ACM U of T Tryouts C2 D - Diablo Bot ICPC 7p 8.2% 97
ACM U of T Tryouts C1 E - Foxling Feeding Frenzy ICPC 7 30.2% 117
WC '18 Contest 1 S2 - Essay Generator Woburn Challenge 7p 37.5% 221
WC '18 Contest 1 S1 - Inspiration Woburn Challenge 7p 29.0% 67
IOI '09 P5 - Garage IOI 7 46.4% 530
IOI '09 P3 - POI IOI 7 28.8% 527
NOI '98 P1 - Personal Income Tax China NOI 7 57.5% 20
NOI '00 P4 - Trie China NOI 7 50.3% 120
NOI '97 P2 - Optimal Routing China NOI 7p 28.5% 59
NOI '97 P1 - Competition Ranking China NOI 7 32.3% 38
NOI '11 P4 - Road Construction China NOI 7p 44.8% 101
Maximum Sum Uncategorized 7 33.4% 784
Longest Increasing Subsequence Uncategorized 7 29.4% 643
PEG Test '14 - Air Uncategorized 7 21.1% 48
PEG Test '14 - Change Uncategorized 7 39.3% 50
BlueBook - Bills Bills Bills BlueBook 7 13.7% 147
BlueBook - Calculator BlueBook 7 21.3% 143
Graph Contest 2 P1 - Connected Components Uncategorized 7 36.2% 250
Graph Contest 3 P1 - Travelling Salesmen Uncategorized 7 33.9% 298
Graph Contest 2 P3 - Trees Uncategorized 7 33.5% 148
Graph Contest 3 P3 - Cable TV Uncategorized 7 39.1% 185
ACSL '09 Practice P1 - Kansas Uncategorized 7 14.7% 67
ACSL '09 Practice P4 - Rank Uncategorized 7 46.1% 829
ICPC NEERC 2010 A - Alignment of Code ICPC 7 54.0% 21
CCO '03 P5 - Longest Substring CCO 7p 15.8% 86
MMM '14 A - Distinct Prime Factors Uncategorized 7 26.4% 226
Mock CCC '14 S3 - Spreadsheet Sorting Mock CCC 7 49.0% 425
Mock CCC '14 S2 - Sleep Cycle Mock CCC 7p 15.9% 103
Mock CCC '14 J4 - Selecting Shifts Mock CCC 7p 11.5% 52
Alawn's Problem Uncategorized 7 41.4% 25
COCI '09 Contest 5 #3 Kletva COCI 7 21.5% 32
COCI '12 Contest 1 #2 F7 COCI 7 50.7% 33
COCI '12 Contest 1 #3 Koncert COCI 7 25.4% 10
COCI '10 Contest 1 #3 Sretan COCI 7 40.3% 53
WC '18 Contest 3 J4 - Leveling Up Woburn Challenge 7p 32.1% 84
WC '16 Contest 4 J2 - You're Dead! Woburn Challenge 7p 31.3% 43
WC '18 Contest 4 J4 - Your Name, Please Woburn Challenge 7p 13.6% 14
WC '96 P2 - Row and Column Woburn Challenge 7 13.3% 35
WC '18 Contest 2 J4 - Ammunition Woburn Challenge 7p 21.0% 49
WC '95 P1 - Coded Message Woburn Challenge 7 9.0% 54
WC '18 Contest 2 S1 - Laser Grid Woburn Challenge 7p 57.3% 113
WC '15 Contest 3 S1 - Energy Absorption Woburn Challenge 7p 14.3% 34