Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users
ICPC ECNA 2016 I - Waif Until Dark ICPC 15 35.6% 30
ECOO '12 R3 P2 - Jewelry Tips ECOO 12p 44.4% 6
ECOO '13 R3 P4 - Tour de Force ECOO 12p 48.9% 78
ECOO '15 R2 P2 - So So ECOO 12p 17.0% 10
ECOO '15 R2 P4 - Rectangle Roundup ECOO 12p 32.9% 17
ECOO '15 R3 P2 - Tiling Trouble ECOO 15p 20.0% 2
ECOO '15 R3 P4 - Under the Rug ECOO 12p 8.7% 2
ECOO '16 R2 P1 - Palindrome Panic ECOO 12p 14.8% 89
ECOO '16 R2 P4 - Hop, Skip and Jump ECOO 12p 27.9% 18
ECOO '16 R3 P4 - Cuthbert's Calculator ECOO 15p 68.2% 5
ECOO '17 R2 P3 - Lunch Time ECOO 12p 15.8% 27
ECOO '17 R2 P4 - Zig Zag ECOO 12p 39.2% 32
ECOO '17 R3 P3 - Region Selection ECOO 12p 36.0% 18
ECOO '17 R3 P4 - Ice Cream Beach ECOO 15p 18.4% 36
ECOO '18 R2 P3 - Factorial ECOO 12p 17.8% 60
ECOO '18 R2 P4 - Three Squares ECOO 15p 30.9% 11
ECOO '18 R3 P1 - Balanced ECOO 12p 28.3% 13
ECOO '18 R3 P2 - Vegenère ECOO 12p 8.3% 6
ECOO '18 R3 P4 - Circular Cities ECOO 15p 14.5% 7
ECOO '19 R1 P4 - Bus Route ECOO 12 9.6% 12
ECOO '19 R2 P3 - Ribbon ECOO 15p 19.8% 13
ECOO '19 R2 P4 - Tunnels ECOO 12p 32.6% 7
ECOO '19 R3 P2 - Array Game ECOO 12p 21.1% 5
ECOO '19 R3 P3 - Wall ECOO 15p 44.2% 4
ECOO '19 R3 P4 - Network ECOO 15p 0.5% 1
ECOO '20 P4 - Ring ECOO 12p 17.2% 80
DMOJ Capture The Flag '20 R4 - Python Cycles CTF 12 43.8% 14
EGOI '21 P2 - Luna Likes Love EGOI 12p 24.7% 50
EGOI '22 P2 - Lego Wall EGOI 15p 10.2% 25
EGOI '22 P3 - Social Engineering EGOI 15p 6.3% 17
EGOI '23 P6 - Candy EGOI 12p 21.8% 58
Evan's Cube Uncategorized 12p 26.1% 10
Expected Value Uncategorized 15 24.2% 21
Falling Snowflakes Uncategorized 15p 40.2% 38
Fast LCA Uncategorized 12 22.4% 53
The Codefather Uncategorized 15p 6.8% 21
Facebook Hacker Cup '15 Round 1 P3 - Winning at Sports FHC 12 49.3% 197
Facebook Hacker Cup '15 Round 2 P2 - All Critical FHC 15 55.2% 42
Facebook Hacker Cup '15 Round 3 P1 - Boomerang FHC 12p 24.9% 25
Facebook Hacker Cup '15 Round 3 P2 - Lunch Scheduling FHC 15p 14.6% 7
Facebook Hacker Cup '19 Final Round P1 - Strings as a Service FHC 15p 31.3% 5
Fibonacci Sequence Uncategorized 15p 13.1% 829
Fixing Shirts Uncategorized 15 19.4% 27
A Floyd-Warshall Problem Uncategorized 15 0.6% 2
The Fox and the Wolf Uncategorized 15p 6.6% 7
Imperative French Uncategorized 15 6.4% 22
The Game of Nim Uncategorized 12p 29.8% 33
GCC '16 P2 - Classified Documents Uncategorized 15p 10.9% 4
Google Code Jam '09 Round 1A Problem A - Multi-base happiness Google Code Jam 12p 40.0% 3
Google Code Jam '09 Round 1A Problem B - Crossing the Road Google Code Jam 15p 11.1% 1