Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▾ Users
WC '16 Contest 3 S4 - Replay Value Woburn Challenge 15p 14.7% 22
Facebook Hacker Cup '14 Final Round P3 - Fortunate Wheels Uncategorized 40 14.7% 9
ECOO '16 R2 P1 - Palindrome Panic ECOO 12p 14.7% 88
TLE '16 Contest 3 P3 - Mysterious Package TLE 10p 14.7% 33
Baltic OI '01 P5 - Mars Maps Baltic OI 15p 14.7% 29
NOI '08 P5 - Candy Rain China NOI 30p 14.7% 10
ACSL '09 Practice P1 - Kansas Uncategorized 7 14.7% 67
DMOPC '15 Contest 5 P1 - Gel Bananas DMOPC 3p 14.7% 225
Facebook Hacker Cup '15 Round 3 P2 - Lunch Scheduling FHC 15p 14.6% 7
Another Contest 2 Problem 1 - Poutine ACC 15 14.6% 106
Clique Uncategorized 15p 14.6% 57
MALD Contest 1 P6 - Scratch Cat and Painting Uncategorized 17p 14.6% 13
TLE '16 Contest 1 P3 - Joey and Chemistry TLE 7p 14.6% 30
COCI '21 Contest 4 #4 Parkovi COCI 25p 14.6% 21
CCC '99 S2 - Year 2000 CCC 7 14.6% 105
TLE '15 P3 - Poetry TLE 10p 14.6% 42
Back To School '19: FFT Fun Seasonal 20p 14.6% 16
DMPG '19 S6 - A Strange Array DMOPC 15p 14.6% 37
COCI '19 Contest 1 #4 Trobojnica COCI 15p 14.6% 6
DMOPC '21 Contest 7 P6 - Rainbow Subgraphs DMOPC 30p 14.6% 8
NOI '19 P4 - Jump China NOI 25p 14.6% 40
Dynamic Sum Uncategorized 15 14.6% 16
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude! Uncategorized 5p 14.6% 19
MCIPC Contest 1 P4 - Snack Line Uncategorized 7p 14.5% 14
Baltic OI '18 P5 - Genetics Baltic OI 25p 14.5% 45
Temple Construction Uncategorized 20p 14.5% 4
Foxlings Uncategorized 10p 14.5% 76
COCI '13 Contest 6 #5 Hash COCI 15p 14.5% 14
DWITE '11 R1 #3 - Take a Walk DWITE 10 14.5% 18
Cheerio Contest 2 P4 - Modulus Finding Uncategorized 7p 14.5% 18
TLE '16 Contest 4 P4 - Christmas Tree Building TLE 15p 14.5% 177
Recurrence Solver Uncategorized 15p 14.4% 15
Back To School '19: Heist Night Seasonal 15p 14.4% 31
An Animal Contest 4 P2 - Lavish Lights AAC 10 14.4% 210
New Year's '15 P5 - Message to Mars Seasonal 20p 14.4% 52
CCO '07 P2 - Snowflakes CCO 10 14.4% 958
CCO '18 P4 - Gradient Descent CCO 15p 14.4% 247
DMOPC '19 Contest 6 P3 - Grade 11 Math DMOPC 10p 14.4% 119
Wesley's Anger Contest Reject 3 - Christmas Carols WAC 25p 14.4% 13
DMPG '19 G5 - Hunting the White Whale DMOPC 20p 14.4% 70
Power Distribution Uncategorized 7p 14.4% 30
DMOPC '20 Contest 6 P1 - Tug of War DMOPC 7p 14.4% 164
IOI '99 P2 - Hidden Codes IOI 20p 14.4% 10
OCC '19 S3 - NAN Language Olympiads School 7p 14.4% 31
COCI '06 Contest 1 #6 Debug COCI 20p 14.4% 121
CEOI '17 P3 - Mousetrap CEOI 25p 14.4% 16
UACC 1 P5 - A Lab Report Uncategorized 10 14.3% 52
Heap Dijkstra Revisited Data Structure Tests 10 14.3% 10
Mock CCO '19 Contest 1 Problem 5 - A Tree Problem Mock CCO 25p 14.3% 6
OCC '19 G3 - Binary Game Olympiads School 25p 14.3% 5