Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
COCI '22 Contest 2 #3 Lampice COCI 17p 25.5% 34
WOSS Dual Olympiad 2022 J4: Fire on Christmas Day Seasonal 7p 13.7% 34
COCI '23 Contest 2 #4 Kuglice COCI 12p 35.1% 34
Mock CCC '24 Contest 1 J5 - Mathland Mock CCC 10p 8.1% 34
Collate The Findings Uncategorized 0 15.3% 34
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
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
Segment Tree Practice 3 Uncategorized 15 49.0% 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 Preparation Test 2 P1 - Concatenation Mock CCO 17p 13.1% 32
COCI '14 Contest 7 #6 Police COCI 30p 12.9% 32
DMOPC '15 Contest 7 P4 - Magic DMOPC 10p 10.3% 32
New Year's '17 P4 - Christmas Cozonac Seasonal 12p 16.8% 32
TC Uncategorized 15p 10.8% 32
ECOO '13 R2 P1 - Upsetris ECOO 5p 38.4% 32
DWITE '07 R4 #1 - Curve-shot DWITE 5 56.1% 32
DWITE '08 R2 #5 - Water damage DWITE 7 22.4% 32
DWITE '12 R5 #1 - Travel Time DWITE 5 43.8% 32
New Year's '18 P7 - Tree of Life Seasonal 20p 13.5% 32
Dynamic Tree Test Data Structure Tests 45 30.0% 32
Double Doors Regional P6 - Tudor Learns More DDR Uncategorized 17 17.7% 32
DMOPC '18 Contest 1 P5 - Sorting DMOPC 12p 24.7% 32
Back To School '18: Function Maximization Seasonal 25p 13.6% 32
Back To School '19: Unstable Books Seasonal 15p 29.9% 32
APIO '08 P3 - DNA APIO 15p 30.8% 32