Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
COCI '19 Contest 1 #1 Trol COCI 5p 22.3% 57
COCI '19 Contest 4 #2 Spiderman COCI 7p 20.6% 57
CCC '20 S2 - Escape Room (Hard) CCC 15p 5.4% 57
NOI '09 P5 - Pipe Marbles China NOI 25p 15.3% 57
Mock CCC '14 S4 - Roadtrip Tracking Mock CCC 15p 8.9% 57
WC '18 Contest 4 S2 - Farming Simulator Woburn Challenge 15p 35.1% 57
WC '99 P2 - Mission Impossible Woburn Challenge 7 18.7% 57
DMOJ Capture The Flag '20 F2 - Queries & Strings CTF 5 66.7% 57
Clique Uncategorized 15p 14.6% 57
DMOPC '20 Contest 4 P4 - Javelin Throwing DMOPC 15p 20.0% 57
Wesley's Anger Contest 6 Problem 5 - Canadian Christmas Cactus WAC 15p 16.8% 57
COCI '16 Contest 6 #4 Savršen COCI 7p 43.4% 57
Mock ECOO '14 P1 - Do You Want to Build a Snowman? ECOO 12 8.5% 56
JOI '13 Open P2 - Synchronization JOI 35p 29.8% 56
VMSS '15 #0 - Head Data Slave Applications VM7WC 10 25.7% 56
CCO Preparation Test 4 P3 - Dynamic MST Mock CCO 25p 23.2% 56
MWC '15 #4 P1: Love Guru 2 MWC 3 31.1% 56
Back To School '16: Times Table Seasonal 17p 9.6% 56
TLE '16 Contest 7 P3 - NOR TLE 10p 31.5% 56
CCO '17 P2 - Cartesian Conquest CCO 20p 9.7% 56
RTE '16 J2 - Guidance Counselling Uncategorized 7p 17.7% 56
DWITE '08 R3 #1 - ASCII Rhombus DWITE 5 70.5% 56
TLE '17 Contest 5 P3 - Willson and Factorization TLE 7p 37.0% 56
DMOPC '17 Contest 5 P5 - XOR Bridges DMOPC 15p 18.7% 56
DMOPC '20 Contest 7 P4 - Mimi and Carrots II DMOPC 17p 24.2% 56
DMPG '19 B6 - Oddity DMOPC 10 20.1% 56
Please Help Me Uncategorized 15 17.8% 56
PIB '20 P3 - Rulebreaker Uncategorized 7p 29.7% 56
JOI '17 Final P4 - Commuter Pass JOI 15 26.2% 56
King Graff's Tolls Uncategorized 17p 27.4% 56
WC '95 P1 - Coded Message Woburn Challenge 7 9.3% 56
Busy Schedule Uncategorized 10 44.2% 56
COCI '12 Contest 3 #2 Poredak COCI 5 23.8% 56
SAC '22 Code Challenge 4 P5 - Obligatory Interactive Problem SAC Coding Challenge 12p 15.1% 56
DMOPC '21 Contest 2 P4 - Water Mechanics DMOPC 15p 23.4% 56
Waterloo 2022 Fall D - Course Selection Waterloo Local 5 64.5% 56
DMOPC '23 Contest 1 P4 - Wandering Walk DMOPC 17p 6.5% 56
Halloween '14 P4 - Fox Girls Seasonal 20p 7.1% 55
MEC '16 P2 - Conveyor Belt Seasonal 5p 20.8% 55
DWITE '08 R1 #1 - LaNDscAPE ii DWITE 3 64.3% 55
LKP '18 Contest 1 P6 - The Great Fire of Köres Uncategorized 20p 16.8% 55
DMOPC '18 Contest 3 P3 - Bob and Math Class DMOPC 10p 14.9% 55
DMOPC '18 Contest 6 P2 - Enantiomers DMOPC 7 16.9% 55
Another Contest 4 Problem 7 - A Sack of Creatures ACC 0 57.7% 55
CCO '00 P5 - Millikan's Oil Droplet Experiment CCO 7 22.1% 55
GlobeX Cup '19 J3 - Codex Uncategorized 5p 15.8% 55
IOI '95 Practice Task 2 - Word Chains IOI 12 44.2% 55
IOI '00 P2 - Car Parking IOI 15p 18.3% 55
Mock CCC '14 J4 - Selecting Shifts Mock CCC 7p 11.5% 55
COCI '10 Contest 1 #3 Sretan COCI 7 40.8% 55