Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▴
COCI '23 Contest 2 #5 Zatopljenje COCI 15p 39.8% 32
DMOPC '14 Contest 1 P6 - Biology Homework DMOPC 17p 18.7% 33
Sword Art Online Judge 3 Seasonal 7 13.1% 33
CCCHK '15 J5 - No friends in the same group. CCC 15p 9.8% 33
COCI '15 Contest 1 #5 Relativnost COCI 17p 13.9% 33
TLE '16 Contest 3 P3 - Mysterious Package TLE 10p 14.7% 33
TLE '16 Contest 5 P5 - Better Ranking List TLE 20p 24.9% 33
COCI '06 Contest 6 #6 Prostor COCI 25p 27.7% 33
DMPG '17 B3 - Heroes DMOPC 5p 9.0% 33
DWITE '10 R4 #1 - Future Printer DWITE 3 47.9% 33
COCI '17 Contest 4 #4 Vođe COCI 12p 41.7% 33
Mock CCO '18 Contest 3 Problem 3 - Roger Just Plays Some More Chess Mock CCO 20p 12.3% 33
Back To School '18: Function Maximization Seasonal 25p 13.8% 33
IOI '19 P5 - Vision Program IOI 20p 8.2% 33
COCI '19 Contest 3 #3 Drvca COCI 15p 17.7% 33
NOI '09 P4 - Plants vs. Zombies China NOI 25p 22.3% 33
IOI '95 P4 - Letter Game IOI 15p 26.9% 33
COCI '12 Contest 1 #2 F7 COCI 7 50.7% 33
WC '15 Contest 3 S2 - Detective Work Woburn Challenge 10 36.9% 33
WC '15 Contest 2 S3 - Revenge of the Sith Woburn Challenge 15p 18.5% 33
WC '16 Finals S2 - Rational Recipes Woburn Challenge 7p 32.2% 33
WC '16 Contest 3 J1 - The Elite N Woburn Challenge 7p 18.6% 33
WC '15 Contest 2 S2 - Attack of the Clones Woburn Challenge 12p 13.9% 33
WC '17 Contest 1 S3 - Crosscountry Canada Woburn Challenge 15p 30.3% 33
COCI '09 Contest 7 #5 Kraljevi COCI 15p 25.7% 33
T-800's Escape Uncategorized 10 17.1% 33
N-K Special Uncategorized 10p 8.4% 33
James' XOR Update Uncategorized 12p 28.7% 33
COCI '13 Contest 4 #3 Sumo COCI 10p 28.0% 33
COCI '12 Contest 5 #2 Arhipelag COCI 7p 30.3% 33
UCRPC F21 F - Trip Navigator ICPC 12p 39.6% 33
SAC '22 Code Challenge 3 Junior P5 - Normal Encoding SAC Coding Challenge 10p 17.8% 33
DMOPC '21 Contest 8 P5 - Tree Building DMOPC 25p 9.2% 33
CCO '22 P5 - Phone Plans CCO 20p 12.8% 33
APIO '23 P1 - Cyberland APIO 17p 8.8% 33
DMOPC '13 Contest 3 P4 - Snowman DMOPC 15p 12.5% 34
IOI '15 P3 - Teams IOI 35p 8.8% 34
HCI '16 - Ulam Spiral Uncategorized 5p 17.0% 34
COCI '07 Contest 2 #6 Pravokutni COCI 10 5.5% 34
CCO '17 P6 - Shifty Grid CCO 30p 17.8% 34
DWITE '11 R5 #5 - Binary Weight DWITE 5 21.8% 34
Dynamic Tree Test Data Structure Tests 45 30.4% 34
UTS Open '18 P7 - Gossip Network Uncategorized 25p 9.2% 34
New Year's '19 P8 - Best Hat in Town II Seasonal 25 18.3% 34
COCI '18 Contest 5 #4 Parametriziran COCI 15p 18.3% 34
CCO '09 P3 - Beware the Geoducks CCO 10 9.8% 34
CEOI '19 P5 - Magic Tree CEOI 20p 9.3% 34
Baltic OI '19 P6 - Olympiads Baltic OI 20p 20.3% 34
COCI '19 Contest 3 #4 Lampice COCI 25p 11.3% 34
COCI '19 Contest 3 #5 Sob COCI 15p 30.3% 34