Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
SAC '22 Code Challenge 4 P2 - Obligatory String Problem SAC Coding Challenge 5 34.8% 143
Mock CCC '22 Contest 1 J5 - New Year's Restrictions Mock CCC 7p 24.9% 143
Intertwined Strings Uncategorized 7p 42.5% 143
New Year's '16 P2 - The 365 Days of Christmas Seasonal 5p 24.9% 142
MWC '15 #1 P2: Postcard MWC 3p 30.9% 142
COCI '06 Contest 3 #3 Trojke COCI 7 56.6% 142
THICC '17 P6 - Tunnels Uncategorized 15p 24.5% 142
Back To School '18: Making Friends Seasonal 7p 18.1% 142
VMSS Pre-Pre-Windsor P6 - InterNAV Uncategorized 7 37.3% 142
Another Contest 2 Problem 2 - Poutine ACC 10 28.6% 142
GlobeX Cup '18 S1 - Code Copiers Uncategorized 5p 52.0% 142
IOI '96 P4 - Sorting a Three-Valued Sequence IOI 10 31.9% 142
WC '16 Contest 1 S3 - Tricky's Treats Woburn Challenge 12p 33.5% 142
CCCHK '15 S1 - Finding number of pairs CCC 7p 13.7% 142
DMOJ Capture The Flag '20 F1 - RGB CTF 3 63.5% 142
Cheerio Contest 1 S1/J4 - Going to School Uncategorized 5p 45.2% 142
ETSR '23 Online Round 2 Problem 1 - Pencil Uncategorized 3p 69.2% 142
COCI '14 Contest 1 #6 Kamp COCI 20p 34.8% 141
Tree Cutting Seasonal 12p 35.0% 141
CCO '16 P5 - Zombie Apocalypse CCO 15p 19.1% 141
RGPC '17 P1 - Circle Clicking! Uncategorized 5 15.2% 141
COCI '07 Contest 3 #5 Cudak COCI 15p 23.1% 141
TLE '17 Contest 7 P3 - Countless Calculator Computations TLE 7p 17.6% 141
APIO '14 P2 - Split the Sequence APIO 25p 11.6% 141
IOI '05 P4 - Birthday IOI 12p 15.7% 141
April Fools' Day Contest 1 P6 - April Fools' Day (BOJ Edition) Uncategorized 0 3.1% 141
COCI '22 Contest 1 #1 Desni Klik COCI 5p 68.9% 141
CCO Preparation Test 6 P3 - HopScotch Mock CCO 20p 23.1% 140
Summer Institute '17 Contest 1 P10 - Trading Cards SIUCF 3 63.0% 140
DMOPC '17 Contest 4 P3 - Third Place DMOPC 7p 16.8% 140
CCO '06 P1 - CN Tower CCO 5 25.4% 140
DMOPC '21 Contest 10 P5 - Number Theory DMOPC 20p 43.4% 140
BSSPC '22 P5 - Derrick and Orz Trees Uncategorized 7p 19.4% 140
VM7WC '16 #6 Gold - Cold War Telecom VM7WC 10 23.6% 139
DWITE '11 R5 #1 - Age Gate DWITE 3 40.4% 139
Summer Institute '17 Contest 1 P9 - Safe Square SIUCF 7 57.7% 139
TLE '17 Contest 4 P3 - Fax's Christmas Dish TLE 7p 26.0% 139
COCI '18 Contest 5 #2 Jarvis COCI 5p 37.8% 138
VPEX P4 - Etopika Uncategorized 12p 19.3% 138
IOI '04 P6 - Empodia IOI 30p 16.8% 138
COCI '16 Contest 4 #2 Kartomat COCI 5p 74.2% 138
COCI '11 Contest 5 #2 Eko COCI 5p 21.6% 138
An Animal Contest 7 P2 - Squirrel Structures AAC 7p 15.2% 138
GFSSOC '15 Fall S5 - Raider GFSSOC 17p 14.0% 137
COCI '15 Contest 4 #4 Chewbacca COCI 12p 27.0% 137
TLE '16 Contest 3 P4 - Gaussian Elimination TLE 7p 30.6% 137
ICPC NAQ 2015 F - Quick Brown Fox ICPC 5 41.6% 137
Another Contest 4 Problem 10 - Two Rectangles ACC 0 56.5% 137
DMOPC '19 Contest 7 P3 - Tree Pruning DMOPC 12p 21.3% 137
COCI '09 Contest 4 #2 Planina COCI 5 53.8% 137