Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▴
Dominoes Uncategorized 25 9.1% 49
COCI '20 Contest 3 #2 Vlak COCI 10p 46.0% 49
COCI '16 Contest 3 #3 Kroničan COCI 10p 54.2% 49
COCI '10 Contest 6 #2 Uspon COCI 5p 68.8% 49
CCO '21 P3 - Through Another Maze Darkly CCO 25p 20.5% 49
COCI '21 Contest 2 #5 Osumnjičeni COCI 20p 24.2% 49
Yet Another Contest 1 P4 - No More Searching YAC 12p 18.9% 49
Building Uncategorized 10p 24.5% 49
MCIPC Contest 1 P1 - Cypher Uncategorized 5p 36.9% 49
COCI '22 Contest 5 #3 Logaritam COCI 12p 46.9% 49
Amplitude Hackathon '23 Problem 1 - Company Values Uncategorized 0p 30.4% 49
Matrix Determinant Uncategorized 15p 10.5% 50
COCI '14 Contest 6 #3 Meteor COCI 7p 11.4% 50
MNYC '16: ECOO! Seasonal 5p 10.1% 50
TSOC '16 Contest 2 #3 - Lu Han and Birthday TSOC 10p 14.9% 50
COCI '08 Contest 4 #5 Trezor COCI 25p 32.5% 50
Back From Summer '17 P4: Pair Programming Seasonal 12p 27.4% 50
DWITE '12 R1 #3 - Costume Party DWITE 5 43.7% 50
TLE '17 Contest 3 P5 - Hypercube Hotel TLE 17p 25.3% 50
CCO '18 P5 - Boring Lectures (Online Version) CCO 30p 7.3% 50
DMPG '19 S3 - Chemical Counting Capers DMOPC 10p 11.6% 50
Wesley's Anger Contest 1 Problem 4 (Easy Version) - A Red-Black Tree Problem WAC 15p 47.0% 50
CCO '09 P2 - Dinner CCO 20p 9.8% 50
APIO '19 P1 - Strange Device APIO 20 21.1% 50
APTX 4869 Uncategorized 10 44.7% 50
PEG Test '14 - Change Uncategorized 7 39.3% 50
DMOJ Capture The Flag '20 F2 - Queries & Strings CTF 5 66.3% 50
IOI '14 Practice Task 2 - Station IOI 7p 57.9% 50
COCI '10 Contest 5 #1 Gljive COCI 3p 40.8% 50
Fizz Coke Uncategorized 7p 27.8% 50
An Animal Contest 5 P5 - Counting Rectangles AAC 15p 12.3% 50
MNYC '16: Moore's Law Seasonal 5p 11.6% 51
ECOO '16 R2 P2 - CC+ ECOO 7p 30.6% 51
New Year's '17 P5 - The Christmas Swap Seasonal 15 20.8% 51
COCI '06 Contest 6 #5 V COCI 15p 20.3% 51
COCI '07 Contest 6 #5 Princeza COCI 15 30.4% 51
APIO '16 P1 - Boat APIO 20p 19.7% 51
APIO '16 P2 - Fireworks APIO 40p 29.5% 51
LKP '18 Contest 1 P5 - The Treaty of Wellacotia Uncategorized 17p 11.8% 51
LKP '18 Contest 1 P3 - Polynomial Madness Uncategorized 7p 12.2% 51
COCI '19 Contest 4 #2 Spiderman COCI 7p 19.7% 51
QCC P4 - Genetic Sequencing Uncategorized 5p 54.4% 51
NOI '19 P1 - Route China NOI 25p 12.1% 51
IOI '98 P5 - Camelot IOI 15p 40.6% 51
WC '99 P3 - The Godfather Woburn Challenge 5 28.9% 51
WC '17 Contest 2 S1 - Keeping Score Woburn Challenge 5p 33.3% 51
WC '17 Contest 3 S2 - GleamingProudChickenFunRun Woburn Challenge 12p 17.1% 51
COCI '10 Contest 4 #2 Parket COCI 5p 52.3% 51
COCI '11 Contest 5 #3 Dna COCI 10p 48.0% 51
Tropical Bananas Uncategorized 10p 43.5% 51