Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▴ Users
WC '17 Contest 1 S2 - Ride the Rocket Woburn Challenge 10p 30.3% 29
Baltic OI '16 P6 - Swap Baltic OI 15p 30.3% 7
DMOPC '15 Contest 2 P4 - Personal Assistant DMOPC 12p 30.3% 246
New Year's '16 P1 - Late Christmas Shopping Seasonal 3p 30.3% 180
COCI '12 Contest 6 #3 Dobri COCI 7p 30.3% 89
BSSPC '21 S2 - Hacker Soup Uncategorized 7p 30.3% 148
Longest Balanced Subsequence Uncategorized 15p 30.3% 28
COCI '19 Contest 3 #5 Sob COCI 15p 30.3% 34
COCI '12 Contest 5 #2 Arhipelag COCI 7p 30.3% 33
Dynamic Tree Test Data Structure Tests 45 30.4% 34
DWITE '12 R2 #1 - Sugar Rush DWITE 3 30.4% 101
Summer Institute '17 Contest 3 P5 - Balanced Cycles SIUCF 20 30.4% 120
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun DMOPC 5p 30.4% 293
COCI '07 Contest 6 #5 Princeza COCI 15 30.4% 51
CCO '19 P1 - Human Error CCO 10p 30.4% 89
Monkey Cards Uncategorized 12 30.4% 27
Non-space-separated Uncategorized 10 30.4% 44
CCO '07 P6 - Road Construction CCO 20p 30.4% 181
UTS Open '15 #4 - Subway Uncategorized 17p 30.4% 72
Amplitude Hackathon '23 Problem 1 - Company Values Uncategorized 0p 30.4% 49
COCI '08 Contest 4 #4 Slikar COCI 17p 30.4% 129
ICPC ECNA 2019 C - Cheese, If You Please ICPC 25 30.4% 3
COCI '09 Contest 5 #5 Program COCI 12 30.4% 96
Baltic OI '10 P1 - BEARs Baltic OI 15 30.4% 5
COI '12 #4 Spijuni COCI 10p 30.4% 24
CCO '08 P1 - Moving Day CCO 7p 30.5% 106
DMPG '16 S3 - The Faster Way DMOPC 10p 30.5% 82
Back To School '16: Harambe Seasonal 3p 30.5% 913
DMPG '19 B3 - Contact DMOPC 3 30.5% 231
The Cosmic Era P3 - Battle Positions Uncategorized 7 30.5% 988
CCC '17 S3 - Nailed It! CCC 7p 30.5% 1720
TLE '16 Contest 2 P1 - In Debt TLE 3p 30.5% 179
CCC '08 S2 - Pennies in the Ring CCC 5 30.5% 1184
UTS Open '15 #6 - Tetrahedra Uncategorized 40p 30.5% 28
COCI '13 Contest 1 #3 Ratar COCI 15p 30.5% 56
WC '97 P4 - Typing Woburn Challenge 5 30.5% 249
ECOO '16 R2 P2 - CC+ ECOO 7p 30.6% 51
WC '16 Contest 4 S2 - Pawpsicles Woburn Challenge 12p 30.6% 35
TLE '15 P6 - Rock, Paper, Scissors TLE 20p 30.6% 56
COCI '21 Contest 1 #2 Kamenčići COCI 10p 30.6% 66
A Simple Game Uncategorized 7p 30.6% 84
Baltic OI '05 P3 - Maze Baltic OI 12 30.6% 48
IOI '99 P1 - Little Shop of Flowers IOI 10 30.6% 206
COCI '18 Contest 4 #2 Wand COCI 7p 30.6% 158
COCI '19 Contest 5 #2 Političari COCI 7p 30.6% 92
NOI '22 P4 - Challenge NPC China NOI 25p 30.6% 4
APIO '07 P1 - Mobiles APIO 12p 30.6% 68
TSOC '15 Contest 1 #5 - Giant Ants TSOC 7p 30.6% 406
A Permutation Problem 2 Uncategorized 12 30.7% 20
ACM U of T Tryouts C1 C - Foxhole ICPC 7 30.7% 128