Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
Champion Contest Uncategorized 7 32.4% 174
Yet Another Contest 3 P1 - Shell Swap Scam YAC 5p 24.2% 174
The Contest Contest 1 P2 - A Typical CCC Senior Problem Uncategorized 10p 14.2% 174
VM7WC '15 #6 Gold - Agriphilosophical Data Slaves VM7WC 7 27.4% 173
Waterloo 2017 Winter B - Vera and LCS Waterloo Local 10 15.9% 173
SAC '22 Code Challenge 3 Junior P4 - Normal Conversions SAC Coding Challenge 5p 27.9% 173
COCI '07 Contest 4 #5 Poklon COCI 15p 33.0% 172
CCO '16 P1 - Field Trip CCO 10p 21.8% 171
CCO '12 P5 - Sample Size CCO 7 24.0% 171
CCC '04 S4 - Space Turtle CCC 10p 19.7% 171
DWITE '09 R3 #2 - Rounding to Fibonacci DWITE 5 63.4% 171
LKP '18 Contest 1 P2 - Observing Frogs Uncategorized 5p 26.5% 171
COCI '18 Contest 1 #3 Cipele COCI 10p 28.0% 171
SAC '22 Code Challenge 4 Junior P3 - Obligatory Triangle Problem SAC Coding Challenge 5p 26.6% 171
WOSS Dual Olympiad 2023 J1: Minimum Price Uncategorized 3 68.5% 171
COCI '14 Contest 6 #5 Neo COCI 17p 50.8% 170
GFSSOC '15 Winter J5 - Secret Santa GFSSOC 7p 59.3% 170
VM7WC '16 #3 Bronze - Shahir-in-a-Box VM7WC 3 44.7% 170
Mock CCO '17 Problem 2 - Penetrating Power Mock CCO 17p 25.6% 170
Count The Triplets Uncategorized 7 10.5% 170
Back From Summer '19 P2: Straying From God's Light Seasonal 7p 17.5% 170
A Greedy Problem Uncategorized 5p 28.6% 170
DMOPC '20 Contest 7 P1 - Bob and Balance DMOPC 7p 23.4% 170
DMPG '18 S5 - Mimi and Division DMOPC 15p 16.2% 169
WC '18 Finals J1 - Conditional Contracts Woburn Challenge 5p 39.7% 169
COCI '17 Contest 5 #2 Spirale COCI 7p 33.8% 169
Raytracing Uncategorized 10p 52.1% 168
Another Contest 3 Problem 3 - Lexicographically Largest Common Subsequence ACC 7 18.1% 168
IOI '98 P3 - Party Lamps IOI 12p 34.0% 168
DMOPC '21 Contest 4 P2 - Festive Groups DMOPC 7p 21.1% 168
GFSS Christmas Challenge P1 - Arithmetic Operators GFSSOC 3 70.8% 168
Pie Uncategorized 3 61.5% 168
CCC '00 S5 - Sheep and Coyotes CCC 10p 4.0% 167
DMOPC '22 Contest 2 P2 - Line Trace DMOPC 7p 34.1% 167
OTHS Coding Competition 1 (Mock CCC) J4 - Railgun Uncategorized 7p 23.7% 167
GFSSOC '14 Winter S2 - Speech GFSSOC 5p 24.3% 166
CCO '17 P5 - Professional Network CCO 20p 32.5% 166
DMPG '18 B5 - Mimi and Substrings DMOPC 7p 29.7% 166
COCI '18 Contest 1 #1 Nadan COCI 3p 39.3% 166
DMOPC '18 Contest 6 P0 - SQL Queries DMOPC 3 28.4% 166
ECOO '19 R1 P2 - L-Systems Go ECOO 5p 22.7% 166
DMOPC '19 Contest 5 P4 - Cafeteria Confrontation Conundrum DMOPC 7p 40.1% 166
IOI '11 P1 - Tropical Garden (Standard I/O) IOI 25p 11.8% 166
COCI '14 Contest 4 #4 Mravi COCI 10p 44.9% 165
DWITE '10 R5 #3 - Balancing Act DWITE 7 39.3% 165
Another Contest 4 Problem 3 - An Isosceles Right Triangle ACC 0 42.0% 165
QCC P0 - Thermometer Uncategorized 3 54.1% 165
Another Contest 9 Problem 1 - Black Room Boy ACC 3 53.9% 165
Mock CCC '23 Contest 1 J4 - String Decryption Mock CCC 5p 17.1% 165
COCI '14 Contest 3 #1 Strojopis COCI 5p 62.0% 164