Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
COCI '18 Contest 6 #1 Lun COCI 5p 65.5% 19
CCO '99 P4 - Maple Roundup CCO 10 21.8% 19
CPC '19 Contest 1 P4 - Sorting Practice Uncategorized 12p 7.4% 19
OCC '19 B6 - Fiji water Olympiads School 10p 16.6% 19
GlobeX Cup '19 S3 - Ninjaclasher's Wrath Uncategorized 12p 12.2% 19
GlobeX Cup '19 J5 - Aliens Uncategorized 15 12.6% 19
Boxdropper Uncategorized 20p 21.8% 19
ICPC NEERC 2010 K - Graph Oddity ICPC 12p 28.8% 19
SMAC 08/09 (Nov) #2 - Stock Market II Uncategorized 10p 7.6% 19
WC '17 Finals S3 - Explosive Ordinance Disposal Woburn Challenge 15p 24.4% 19
WC '01 P4 - Cool Runnings Woburn Challenge 10 24.2% 19
WC '02 P10 - The Final Battle Woburn Challenge 10 23.5% 19
CCCHK '15 S3 - Symmetric Cross CCC 12p 15.8% 19
Baltic OI '19 P5 - Necklace Baltic OI 17p 11.7% 19
Digger Uncategorized 15p 16.2% 19
COCI '10 Contest 2 #4 Knjige COCI 5p 36.2% 19
COCI '12 Contest 2 #2 Krizaljka COCI 5p 51.4% 19
COCI '17 Contest 5 #5 Pictionary COCI 17p 44.0% 19
COCI '21 Contest 1 #5 Volontiranje COCI 25p 20.2% 19
Yet Another Contest 1 P5 - Hopping Kangaroos YAC 17p 12.3% 19
Baltic OI '08 P6 - Gloves Baltic OI 17p 13.0% 19
Baltic OI '10 P5 - Candies Baltic OI 17p 25.9% 19
COI '14 #2 Kovanice COCI 15p 12.1% 19
Spy Tree Uncategorized 15p 21.9% 19
DMOPC '22 Contest 3 P6 - Compressibility DMOPC 25p 8.0% 19
Mock CCC '23 1 S4 - Roger Says Yabe Mock CCC 15p 7.2% 19
Google Code Jam '22 Qualification Round Problem C - d1000000 Google Code Jam 5p 52.4% 19
Amplitude Hackathon '23 Problem 5 - Partition Assignment Uncategorized 7p 22.5% 19
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude! Uncategorized 5p 14.3% 19
COCI '23 Contest 4 #4 Putovanje COCI 20p 10.7% 19
COCI '14 Contest 3 #6 Kamioni COCI 30p 15.1% 18
CEOI '14 P2 - Fangorn CEOI 20p 28.3% 18
TSOC '16 Contest 2 #2 - Oh My! TSOC 10 15.3% 18
ECOO '16 R2 P4 - Hop, Skip and Jump ECOO 12p 27.9% 18
COCI '15 Contest 3 #4 Slon COCI 12p 8.9% 18
TLE '16 Contest 4 P5 - Buying Gifts TLE 17p 15.6% 18
HCI '16 - Totient Uncategorized 12p 28.8% 18
Google Kickstart '17 Round A Problem A - Square Counting Google Kick Start 12p 20.6% 18
ECOO '17 R3 P3 - Region Selection ECOO 12p 37.0% 18
ECOO '12 R2 P3 - Airport Radar ECOO 10p 14.0% 18
DWITE '10 R2 #4 - Fractions to Decimal DWITE 7 37.7% 18
DWITE '09 R5 #4 - Kind of like OCR DWITE 7 46.3% 18
DWITE '11 R1 #3 - Take a Walk DWITE 10 14.5% 18
DWITE '09 R2 #1 - Angles DWITE 5 46.6% 18
DWITE '08 R1 #5 - Moving Stuff in Boxes DWITE 7 43.5% 18
TLE '17 Contest 5 P4 - Cloning TLE 15p 6.6% 18
A New Country Uncategorized 25p 24.6% 18
Mock CCC '18 Contest 1 S5 - A Palindrome Problem Mock CCC 15p 8.5% 18
COCI '15 Contest 6 #3 Pianino COCI 10 28.9% 18
COCI '18 Contest 3 #4 NLO COCI 15 31.8% 18