Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▴
COCI '17 Contest 5 #6 Planinarenje COCI 20p 29.4% 5
COCI '17 Contest 7 #6 Priglavci COCI 20p 31.3% 5
JOI '20 Spring Camp Day 3 P1 - Constellation 3 JOI 30p 35.7% 5
JOI '20 Spring Camp Day 3 P2 - Harvest JOI 35p 27.3% 5
Another Contest 6 Problem 11 - Infinite Corridor Simulator ACC 0p 1.9% 5
DMOPC '20 Contest 5 P6 - Top Row DMOPC 35p 3.1% 5
BSSPC '21 S5 - James Solves His Tree Problems Uncategorized 25p 2.1% 5
NOIP '18 P5 - Grid-filling Game China NOI 20p 15.4% 5
NOIP '18 P6 - Defending the Kingdom China NOI 25p 13.0% 5
Baltic OI '07 P4 - Building a Fence Baltic OI 12p 19.2% 5
Mock CCC '22 2 S5 - Kaguya Wants to go Window Shopping with Kei Shirogane Mock CCC 30p 5.5% 5
Baltic OI '10 P1 - BEARs Baltic OI 15 30.4% 5
COI '15 #3 Relay COCI 30p 20.7% 5
NOI '22 Multi-Provincial Team Selection P2 - Tree China NOI 25p 10.5% 5
NOI '22 Multi-Provincial Team Selection P4 - Card China NOI 25p 12.9% 5
Guess the Wordle Uncategorized 10 18.1% 5
Baltic OI '03 P1 - Barrel Baltic OI 10p 9.4% 5
Rule of Lemons Uncategorized 10 16.7% 5
Baltic OI '12 P3 - Peaks Baltic OI 17p 31.3% 5
Baltic OI '12 P4 - Fireworks in RightAngleles Baltic OI 25p 70.0% 5
Baltic OI '04 P5 - Rectangles Baltic OI 10p 10.0% 5
IOI '12 P5 - Last Supper IOI 30p 25.0% 5
NOI '16 P1 - Good Partitions China NOI 20p 7.8% 5
JOI '22 Spring Camp Day 1 P1 - Jail JOI 30p 26.5% 5
DMOPC '22 Contest 4 P6 - K-Sort DMOPC 30p 5.4% 5
Google Code Jam '22 Round 1C Problem B - Squary Google Code Jam 10p 22.2% 5
Google Code Jam '09 Qualification Round Problem A - Alien Language Google Code Jam 5p 63.6% 5
Google Code Jam '10 Round 1A Problem A - Rotate Google Code Jam 7 50.0% 5
Google Code Jam '14 Qualification Round Problem A - Magic Trick Google Code Jam 5p 62.5% 5
Google Code Jam '16 Qualification Round Problem A - Counting Sheep Google Code Jam 5p 35.0% 5
Google Code Jam '17 Qualification Round Problem A - Oversized Pancake Flipper Google Code Jam 5p 35.7% 5
Google Code Jam '18 Round 1A Problem B - Bit Party Google Code Jam 10p 24.1% 5
Google Code Jam '20 Qualification Round Problem B - Nesting Depth Google Code Jam 5p 50.0% 5
Google Code Jam '20 Round 1A Problem C - Square Dance Google Code Jam 10p 35.3% 5
Google Code Jam '21 Round 1A Problem A - Append Sort Google Code Jam 7p 35.0% 5
Another Contest 10 Problem 1 - Wesley's Anger Contest 7 Problem 1 - Ideology ACC 0p 2.1% 5
Counting Problem Uncategorized 17 45.5% 5
JOI '23 Open P3 - Garden JOI 12p 9.4% 5
NOI '23 P2 - Osmanthus Tree China NOI 25p 26.3% 5
HHPC1 P6 - Yarn Street's Strategic Shopping Uncategorized 20p 8.4% 5
COCI '23 Contest 3 #4 Restorani COCI 20p 9.6% 5
COCI '23 Contest 4 #3 Lepeze COCI 25p 9.1% 5
COCI '14 Contest 6 #6 WTF COCI 20p 9.6% 6
CCO '11 P5 - Fixing Disks CCO 40p 7.7% 6
CCO Preparation Test 6 P1 - Bus Routes Mock CCO 20p 24.2% 6
HCI '16 - lvm_ex Uncategorized 10p 10.4% 6
DMPG '17 G6 - Vera and Ice Cream Cake DMOPC 20p 11.3% 6
Google Code Jam '16 World Finals Problem A - Integeregex Google Code Jam 35 49.2% 6
DWITE '07 R5 #5 - Tetris! DWITE 7 25.9% 6
DWITE '08 R5 #5 - Nash in Traffic DWITE 10 25.8% 6