Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▾ Users
WC '18 Contest 1 S3 - Reach for the Top Woburn Challenge 12p 11.7% 118
COCI '06 Contest 5 #6 Dvaput COCI 15p 11.7% 157
DMOPC '21 Contest 9 P5 - Chika Circle DMOPC 20p 11.7% 25
DMPG '17 G3 - Brackets, Braces, Boxes, and Arrows DMOPC 25 11.6% 12
DMOPC '21 Contest 5 P4 - Permutations & Primes DMOPC 17p 11.6% 70
MCIPC Contest 2 P6 - Block Tower Uncategorized 12p 11.6% 9
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles Mock CCC 5p 11.6% 255
Wesley's Anger Contest 2 Problem 2 - Costume Shopping WAC 10 11.6% 49
WC '98 P4 - GATTACA Woburn Challenge 20p 11.6% 6
DMOPC '20 Contest 6 P2 - Interpretive Art DMOPC 7p 11.6% 118
MNYC '16: Moore's Law Seasonal 5p 11.6% 51
Baltic OI '18 P4 - Alternating Current Baltic OI 25p 11.6% 7
The Odd Number Uncategorized 7 11.5% 365
Mock CCC '14 J4 - Selecting Shifts Mock CCC 7p 11.5% 52
IOI '12 P2 - Parachute Rings (Standard I/O) IOI 25p 11.5% 111
CSPC '15 #4 - Reading Logs CSPC 5 11.5% 22
ICPC ECNA 2000 D - Stacking Cubes ICPC 7 11.5% 5
NOI '00 P2 - Program Parser China NOI 12p 11.5% 10
Mock CCC '23 2 S5 - The Obligatory Data Structures Problem Mock CCC 25p 11.5% 4
DMOPC '23 Contest 1 P5 - Perfect Matching DMOPC 25p 11.5% 14
2spooky4me Uncategorized 7 11.5% 442
TLE '16 Contest 2 P4 - Harambe's Noble Quest TLE 15p 11.5% 29
DMOPC '19 Contest 3 P5 - Festival DMOPC 20 11.5% 23
DMPG '19 S3 - Chemical Counting Capers DMOPC 10p 11.5% 49
Balkan OI '11 P1 - Two Circles Balkan OI 30p 11.5% 11
DMOPC '21 Contest 10 P2 - Cycle Sort DMOPC 7p 11.5% 152
Mock CCC '15 J2 - Lowest Exam Mark Mock CCC 5p 11.5% 419
APIO '14 P2 - Split the Sequence APIO 25p 11.5% 142
A Simple Mean Uncategorized 7 11.5% 39
COI '20 #1 Autobahn COCI 15p 11.4% 28
IOI '17 P6 - Ancient Books IOI 25p 11.4% 29
COCI '14 Contest 6 #3 Meteor COCI 7p 11.4% 50
ACSL '09 Practice P6 - Expression Uncategorized 10p 11.4% 29
NOIP '99 P3 - Traveller's Budget China NOI 12p 11.4% 13
Another Contest 6 Problem 10 - Putting the Pieces Together ACC 0p 11.4% 14
Another Contest 8 Problem 4 - Up and Down ACC 15 11.4% 46
IOI '15 P4 - Horses IOI 15p 11.4% 102
DMOPC '19 Contest 4 P5 - Financial Trouble DMOPC 17p 11.4% 40
IOI '03 P5 - Amazing Robots IOI 20 11.4% 38
An Animal Contest 7 P6 - S-Squirrel? AAC 20p 11.4% 7
MEC '16 P6 - Instruments of the Ghostwriters Seasonal 10p 11.3% 15
DMPG '17 G6 - Vera and Ice Cream Cake DMOPC 20p 11.3% 6
TLE '17 Contest 7 P6 - Base Bombing TLE 25p 11.3% 4
DMOPC '15 Contest 3 P6 - Gala DMOPC 30p 11.3% 22
Lexicographically Least Substring (Hard) Uncategorized 15 11.3% 183
Wesley's Anger Contest 3 Problem 5 - Triangle: The Root of All Evil WAC 15p 11.3% 40
DMOPC '20 Contest 1 P5 - Victor Takes Over Canada DMOPC 17p 11.3% 92
Perl Golf Uncategorized 15p 11.3% 41
DMPG '15 G4 - Spacetime Convergence Cannons DMOPC 17p 11.3% 48
Next Semiprime Uncategorized 10p 11.3% 23