Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
COCI '11 Contest 1 #5 Sort COCI 12p 36.2% 30
COCI '16 Contest 7 #3 Igra COCI 10p 21.7% 30
COCI '12 Contest 5 #4 Hipercijevi COCI 10p 25.8% 30
Cute String Merging Uncategorized 15p 35.1% 30
NOI '20 P1 - Delicacy China NOI 25p 12.6% 30
CCO '22 P4 - Bi-ing Lottery Treekets CCO 20p 20.5% 30
A Math Contest P15 - Matrix Fixed Point Uncategorized 20 68.3% 30
EGOI '22 P5 - Data Centers EGOI 10p 33.3% 30
HHPC1 P3 - Yonder Ridge Uncategorized 12p 11.0% 30
The Game of Nim Uncategorized 12p 29.5% 29
Line Sweep Uncategorized 25 9.8% 29
CCCJQR P4 Seasonal 0 30.3% 29
TLE '16 Contest 2 P4 - Harambe's Noble Quest TLE 15p 11.5% 29
Facebook Hacker Cup '17 Qualifying Round P3 - Fighting the Zombie FHC 10p 19.4% 29
TLE '16 Contest 6 (Mock CCC) J4 - Ski Rentals TLE 7p 21.2% 29
Waterloo 2017 Winter D - Vera and Sorting Waterloo Local 15 46.3% 29
DMPG '17 S6 - Brackets, Braces, and Boxes DMOPC 12p 10.0% 29
ECOO '17 R2 P4 - Zig Zag ECOO 12p 39.2% 29
COI '07 #3 Tamnica COCI 15p 13.0% 29
ECOO '14 R3 P4 - Baby Talk ECOO 10p 59.1% 29
IOI '17 P6 - Ancient Books IOI 25p 11.4% 29
Back From Summer '17 P5: Confusing Codeforces Contest Seasonal 25p 14.0% 29
DWITE '11 R3 #5 - Tautology DWITE 10 39.7% 29
DMPG '18 G5 - Triangles DMOPC 15p 20.5% 29
DMPG '18 G2 - Gardening Fun DMOPC 15p 44.5% 29
CCO '96 P6 - Hoppers CCO 15 15.5% 29
COCI '17 Contest 2 #6 Garaža COCI 20 22.0% 29
CCO '01 P5 - Fast Food CCO 7 10.1% 29
Wesley's Anger Contest 2 Problem 3 - Pumpkin Counting WAC 15 22.6% 29
Figurines Uncategorized 20 21.1% 29
ACM U of T Tryouts C3 F - A Pleasant Stroll ICPC 15 17.2% 29
ACSL '09 Practice P6 - Expression Uncategorized 10p 11.4% 29
WC '17 Contest 1 S2 - Ride the Rocket Woburn Challenge 10p 30.3% 29
Baltic OI '17 P1 - Political Development Baltic OI 25p 23.2% 29
Andrew Needs Help Uncategorized 12p 26.2% 29
Mock CCC '21 S4 - Infinite Molecule Mock CCC 12p 8.2% 29
COCI '11 Contest 6 #4 Rez COCI 10p 36.2% 29
IOI '21 P1 - Distributing Candies IOI 30p 13.4% 29
Checker Number Uncategorized 7 18.8% 29
COCI '21 Contest 2 #4 Magneti COCI 25p 25.6% 29
An Animal Contest 6 P4 - Buffet AAC 20p 7.4% 29
Least Multiple Olympiads School 10p 7.9% 29
Baltic OI '01 P5 - Mars Maps Baltic OI 15p 14.7% 29
NOIP '08 P1 - Silly Monkey China NOI 5p 38.4% 29
Wesley's Anger Contest Reject 6 - Geology WAC 12p 17.7% 29
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand Mock CCC 12p 22.0% 29
COCI '23 Contest 3 #3 Milano C.le COCI 10p 35.2% 29
UTS Open '15 #6 - Tetrahedra Uncategorized 40p 30.5% 28
TSOC '15 Contest 1 #3 - Elevators TSOC 5p 31.5% 28
MWC '15 #2 P4: Robotics Summative MWC 5p 22.1% 28