Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % ▴ Users
Mock CCC '22 2 S5 - Kaguya Wants to go Window Shopping with Kei Shirogane Mock CCC 30p 5.5% 5
Imperative French Uncategorized 15 5.5% 17
COCI '07 Contest 2 #6 Pravokutni COCI 10 5.5% 34
MWC '15 #8 P2: ASCII Art MWC 7 5.6% 8
NOI '22 P1 - Major China NOI 25p 5.6% 12
CCC '20 S2 - Escape Room (Hard) CCC 15p 5.6% 55
Cheerio Contest 1 J5 - Arithmetic Sequence Uncategorized 10p 5.6% 22
Decoding Uncategorized 20 5.7% 51
Another Contest 10 Problem 2 - Wesley's Anger Contest 7 Problem 2 - Short Love Letters in CS ACC 0p 5.7% 7
NOI '03 P6 - Wisdom Breaking Connection China NOI 25p 5.7% 5
Calendar Contest Problem 2 — Day of the Week Seasonal 10 5.7% 9
DMOPC '22 Contest 1 P5 - Wesley's Cabins DMOPC 30p 5.7% 7
NOI '10 P5 - Route Planning China NOI 35p 5.7% 2
JOI '19 Open P3 - Virus Experiment JOI 35p 5.7% 2
DWITE '10 R5 #4 - New type of wordplay DWITE 15 5.7% 14
DMOPC '22 Contest 3 P3 - Ina's Takodachis DMOPC 15p 5.7% 58
April Fools' Day Contest 1 P8 - NP-Hard Uncategorized 0 5.7% 25
CCO '20 P3 - Mountains and Valleys CCO 35p 5.8% 25
Wesley's Anger Contest 6 Problem 6 (Hard Version) - Santa's Candy Factory WAC 20p 5.8% 17
DMOPC '19 Contest 4 P6 - little_prince's Specialty Tea House DMOPC 25p 5.8% 16
Another Contest 6 Problem 17 - Boolean (Lunatic) ACC 0p 5.8% 72
UCRPC F21 I - Sphere Mongers ICPC 15p 5.8% 6
COI '09 #3 Loza COCI 20p 5.9% 16
Guess the Sequence Uncategorized 3p 5.9% 185
Mock CCC '23 1 S3 - Richard The Penguin Mock CCC 10p 5.9% 27
Back To School '17: Big Integer Seasonal 35p 5.9% 27
DMPG '15 B6 - Bad S'mores DMOPC 10p 5.9% 22
TLE '17 Contest 3 P4 - Meatballs TLE 12p 5.9% 17
TLE '16 Contest 6 (Mock CCC) S2 - Paper Stapling TLE 10p 6.0% 41
UTS Open '15 #5 - Distribution Channel Uncategorized 20p 6.0% 60
IOI '16 P6 - Aliens (Standard I/O) IOI 30p 6.0% 62
다른 콘테스트 6 문제 5 - Fan Death ACC 0 6.0% 28
DMOPC '21 Contest 8 P3 - Weaker Data DMOPC 25p 6.0% 15
DMOPC '19 Contest 1 P6 - Bob and Binary Strings DMOPC 25p 6.0% 11
IOI '23 P5 - Overtaking IOI 25p 6.1% 11
Sword Art Online Judge 2 Seasonal 10 6.1% 62
String Finding - Hacking Uncategorized 10 6.1% 16
Bubble Cup V8 A Fibonotci Bubble Cup 25 6.1% 4
NOI '15 P6 - Farm China NOI 25p 6.1% 6
DMOPC '21 Contest 6 P5 - Contraband Game DMOPC 25p 6.1% 11
CCC '02 S3 - Blindfold CCC 15 6.1% 150
Digit Sum Uncategorized 15 6.2% 9
DMOPC '21 Contest 5 P6 - Permutations & Primes DMOPC 25p 6.2% 20
NOI '12 P3 - Magic Chessboard China NOI 40p 6.2% 10
DMPG '16 G1 - Explooooosion! DMOPC 15p 6.2% 96
WC '97 P5 - Encoding Grid Woburn Challenge 20 6.3% 1
WC '02 P3 - The Big Book of Recipes Woburn Challenge 10 6.3% 5
UTS Open '21 P6 - Terra Mater Uncategorized 25p 6.3% 15
DMOPC '21 Contest 7 P5 - King's Commands DMOPC 35p 6.3% 6
GlobeX Cup '19 S2 - Predicting Collisions Uncategorized 7p 6.3% 69