Problems

Problem search

Point range
Go Random

Hot problems

Problem Category ▾ Points AC % Users
Mock CCC '22 Contest 2 J5 - Dominating the Olympics Mock CCC 10 16.0% 76
Mock CCC '24 Contest 1 J2 - Simple Elo Rating System Mock CCC 3 34.9% 223
Mock CCC '23 1 S1 - Composite Fibonacci Numbers Mock CCC 5p 13.0% 148
Mock CCC '23 1 S2 - Keenan Hates Triangles Mock CCC 5p 22.9% 97
Mock CCC '23 1 S4 - Roger Says Yabe Mock CCC 15p 7.2% 19
Mock CCC '23 1 S3 - Richard The Penguin Mock CCC 10p 5.9% 27
Mock CCC '23 1 S5 - The Obligatory Data Structures Problem Mock CCC 25p 14.0% 10
Mock CCC '23 Contest 1 J1 - Final Velocity Mock CCC 3 66.3% 739
Mock CCC '23 Contest 1 J3 - Pairing Gifts Mock CCC 5p 12.5% 243
Mock CCC '23 Contest 1 J4 - String Decryption Mock CCC 5p 17.0% 166
Mock CCC '23 Contest 1 J2 - Healthy Schedule Mock CCC 3 38.3% 560
Mock CCC '23 Contest 1 J5 - Calculus Problem Mock CCC 12p 10.1% 41
Mock CCC '23 2 S1 - Composite Fibonacci Numbers Mock CCC 3p 23.2% 282
Mock CCC '23 2 S2 - Keenan Hates Triangles Mock CCC 7p 2.3% 38
Mock CCC '23 2 S3 - Richard The Penguin Mock CCC 10p 3.9% 13
Mock CCC '23 2 S5 - The Obligatory Data Structures Problem Mock CCC 25p 11.5% 4
Mock CCC '23 2 S4 - Roger Says Yabe Mock CCC 15p 19.0% 7
Mock CCC '24 Contest 1 J1 - Lemon Bathtub Mock CCC 3 61.2% 464
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles Mock CCC 5p 11.6% 255
Mock CCC '24 Contest 1 S3 - Optimal Split Point Mock CCC 10p 3.0% 24
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand Mock CCC 12p 22.0% 29
Mock CCC '24 Contest 1 J5 - Mathland Mock CCC 10p 8.1% 34
Mock CCC '24 Contest 1 J3 - RGB Words Mock CCC 5p 13.3% 187
Mock CCC '24 Contest 1 S5 - Mock CCC 2025 Mock CCC 20p 14.2% 18
Mock CCC '24 Contest 1 S2 - Owen the Toucan Mock CCC 7p 33.1% 188
JOI '14 Open P2 - Fortune Telling 2 JOI 25p 22.9% 85
JOI '14 Open P1 - Factories JOI 20p 33.1% 154
JOI '14 Open P5 - Pinball JOI 25p 26.3% 91
JOI '14 Open P6 - Secret JOI 17p 15.8% 116
JOI '14 Open P3 - Space Pirate JOI 50p 1.6% 1
JOI '13 Open P3 - Watching JOI 15p 29.7% 90
JOI '13 Open P2 - Synchronization JOI 35p 29.3% 52
JOI '16 Open P3 - Skyscraper JOI 25p 41.9% 46
JOI '18 Open P1 - Bubble Sort 2 JOI 20p 5.2% 26
JOI '17 Final P4 - Commuter Pass JOI 15 22.9% 43
JOI '17 Final P5 - Snake Escaping JOI 25p 36.4% 14
JOI '19 Final P3 - Collecting Stamps 3 JOI 15 25.4% 39
JOI '18 Spring Camp Day 1 P1 - Construction of Highway JOI 30p 34.0% 28
JOI '18 Spring Camp Day 1 P2 - Fences JOI 30p 50.0% 1
JOI '18 Spring Camp Day 1 P3 - Tents JOI 20p 71.1% 28
JOI '16 Open P2 - Selling RNA Strands JOI 20 15.2% 15
JOI '16 Final P1 - Foehn Phenomena JOI 10p 65.1% 20
JOI '16 Final P2 - Semiexpress JOI 12 54.8% 17
JOI '20 Spring Camp Day 1 P3 - Sweeping JOI 25p 18.2% 2
JOI '20 Spring Camp Day 2 P2 - Making Friends on Joitter is Fun JOI 30p 10.3% 6
JOI '20 Spring Camp Day 2 P3 - Ruins 3 JOI 40p 33.3% 2
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
JOI '20 Spring Camp Day 4 P1 - Capital City JOI 20 47.1% 13
JOI '21 Open P1 - Crossing JOI 20p 42.9% 9