Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
Mock CCC '19 Contest 2 S3 - Tudor Tallies Triangular Totals Mock CCC 10p 5.4% 62
GlobeX Cup '19 J4 - Winni's Lonely Card Game Uncategorized 5p 18.5% 62
Art Academy VII: A Mysterious Object Uncategorized 12p 41.3% 62
Revenge of the Digger Uncategorized 20p 32.8% 62
WC '02 P2 - Cow-bot Woburn Challenge 10 21.9% 62
IOI '16 P6 - Aliens (Standard I/O) IOI 30p 6.0% 62
COCI '16 Contest 5 #1 Tuna COCI 3p 67.7% 62
COCI '12 Contest 2 #1 Mortadela COCI 3p 69.6% 62
Yet Another Contest 2 P3 - Maximum Damage YAC 10p 7.9% 62
Comparing Arrays Uncategorized 15p 16.9% 62
WOSS Dual Olympiad 2022 S2: Festive Card Game Seasonal 7p 19.8% 62
DMOPC '14 Exam Time P6 - Math Homework DMOPC 15p 24.3% 61
ICPC ECNA 2016 C - The Key to Cryptography ICPC 7 46.4% 61
CCO '16 P3 - Legends CCO 30p 9.8% 61
TLE '16 Contest 4 P3 - Cubes TLE 7p 25.7% 61
MNYC '17: ASCII Art II Seasonal 5 42.3% 61
TLE '16 Contest 8 P4 - Delivery Service TLE 17p 9.4% 61
COCI '07 Contest 5 #6 Baza COCI 25 7.6% 61
COCI '08 Contest 1 #5 Skakavac COCI 20p 10.3% 61
DWITE '08 R2 #1 - My shiny digital key DWITE 3 38.5% 61
DMOPC '17 Contest 5 P4 - Intersecting Arcs DMOPC 17p 20.7% 61
Mock CCC '20 Contest 2 S4 - Rotational Arrays Mock CCC 10p 11.8% 61
IOI '98 P6 - Polygon IOI 15 32.0% 61
CCO '03 P1 - BFed CCO 10 25.4% 61
WC '02 P1 - A Planning Session Woburn Challenge 5 16.6% 61
Appleby Contest '20 P5 - Ridiculous Tree Uncategorized 15p 22.4% 61
COCI '17 Contest 5 #1 Olivander COCI 5p 62.9% 61
Canada Day Contest 2021 - 0-1 Seasonal 20p 48.7% 61
An Animal Contest 2 P6 - Koala Transport System AAC 17p 22.2% 61
Prefix Digits Uncategorized 7 15.0% 61
MALD Contest 1 P3 - Scratch Cat and Infestation Uncategorized 7 13.0% 61
A Math Contest P8 - Permutation Counting Uncategorized 12 35.9% 61
Another Contest 9 Problem 2 - Counting Down the Days ACC 7 6.9% 61
COCI '22 Contest 3 #4 Bomboni COCI 12p 15.3% 61
UTS Open '15 #5 - Distribution Channel Uncategorized 20p 6.0% 60
ICPC NAQ 2016 D - Brackets ICPC 15 15.9% 60
Mock CCO '17 Problem 1 - Fast Fuhrer Transform Mock CCO 10p 25.4% 60
Mock CCC '18 Contest 2 S4 - A Tree Problem Mock CCC 12p 16.7% 60
DMOPC '18 Contest 6 P5 - Quadrat Sampling DMOPC 20p 15.2% 60
APIO '07 P3 - Zoo APIO 20p 32.3% 60
OCC '19 S1 - Floor Planning Uncategorized 3p 32.6% 60
Back From Summer '19 P3: ASDFGHJKL Seasonal 10p 8.6% 60
CCO '20 P5 - Interval Collection CCO 25p 16.0% 60
Skyscrapers Uncategorized 15p 18.3% 60
IOI '13 P3 - Wombats (Standard I/O) IOI 40p 9.5% 60
DMOPC '20 Contest 3 P3 - A Ring of Buckets DMOPC 12p 7.0% 60
NOIP '21 P2 - Sequence China NOI 20p 28.8% 60
Max's Anger Contest Series 2 P5 - Job Anger Seasonal 12p 27.3% 60
COCI '23 Contest 2 #1 Pahuljice COCI 5p 43.2% 60
Mine and Tree Seasonal 30p 22.7% 59