Problems

Problem search

Point range
Go Random

Hot problems

Problem Category Points AC % Users ▾
Appleby Contest '19 P5 - Matrix Operation Uncategorized 10p 33.0% 282
New Year's '19 P1 - Snowball Fight Seasonal 3 41.8% 281
COCI '17 Contest 2 #2 ZigZag COCI 5 33.2% 281
Mock CCC '20 Contest 2 S2 - 4D BBST on a DP Mock CCC 5p 27.6% 281
SAC '22 Code Challenge 5 P2 - Querying Extensions SAC Coding Challenge 5p 73.5% 281
Mock CCC '23 2 S1 - Composite Fibonacci Numbers Mock CCC 3p 23.1% 281
COCI '07 Contest 6 #1 Parking COCI 5 53.9% 280
Mocking SpongeBob Uncategorized 3 31.5% 280
Mock CCO '18 Contest 4 Problem 3 - Counterattack Mock CCO 15p 23.6% 280
Mock CCC '20 S2 - Flipper Redux Mock CCC 7p 26.5% 280
PEG Test '11 - Cyclopian Cash Uncategorized 3 28.5% 280
Checkerboard Summation (Easy) Uncategorized 12p 26.1% 280
DMOPC '21 Contest 7 P1 - Chika Grids DMOPC 5p 26.1% 280
RTE '16 S3 - School Traversal Uncategorized 7p 21.2% 279
COCI '19 Contest 5 #1 Emacs COCI 5p 45.8% 279
IOI '13 P5 - Robots (Standard I/O) IOI 20p 15.0% 278
COCI '14 Contest 5 #3 Traktor COCI 7p 46.5% 277
Fast Bit Counting Uncategorized 3p 48.0% 276
Baltic OI '07 P3 - Sound Baltic OI 10p 33.2% 276
Educational DP Contest AtCoder Q - Flowers Uncategorized 15 50.3% 276
Big Deposits Uncategorized 7p 16.8% 276
IOI '12 P3 - Crayfish Scrivener (Standard I/O) IOI 15p 16.8% 276
UTS Open '18 P2 - ABCs Uncategorized 3p 32.3% 275
Primes 2 Uncategorized 15p 14.7% 275
Yet Another Contest 7 P1 - Page Turning YAC 5p 20.0% 275
New Year's '17 P1 - Mr. N and Presents Seasonal 7p 18.5% 274
Mock CCC '19 Contest 2 J4 - Tudor Buys Some Cheesecake Mock CCC 3p 20.2% 274
DMPG '15 S1 - Collecting Dust DMOPC 5 38.5% 272
WOSS Dual Olympiad 2021 J1: Water Classification Seasonal 3 49.6% 272
CCO '96 P5 - All Roads Lead Where? CCO 7 62.6% 271
IOI '05 P2 - Mean Sequence IOI 12p 20.9% 270
COCI '20 Contest 2 #1 Crtanje COCI 5p 35.6% 270
SAC '22 Code Challenge 3 P2 - Unicycle License SAC Coding Challenge 5 41.6% 270
CCO '00 P1 - Subsets CCO 10 35.0% 269
A20 Gate Uncategorized 5 31.4% 268
DWITE '08 R3 #4 - Time for change DWITE 7 61.1% 268
DMOPC '19 Contest 3 P3 - Majority DMOPC 12p 48.3% 268
UTS Open '21 P1 - COVID Party Uncategorized 5p 32.3% 268
TSS Club Fair 2017 Problem A Uncategorized 3p 62.1% 267
COCI '06 Regional #1 Bard COCI 7 27.5% 267
IOI '96 P1 - A Game IOI 10 39.3% 267
Another Contest 8 Problem 2 - Unnecessary Trash Push ACC 3 47.0% 267
CCC '10 S5 - Nutrient Tree CCC 20p 19.6% 266
MWC '15 #3 P3: Bad News MWC 7p 23.2% 266
APIO '12 P1 - Dispatching APIO 17p 26.0% 266
DWITE '10 R3 #3 - Dominos Tiling DWITE 10 46.3% 266
RGPC '18 P3 - Chocolate Day Uncategorized 10 27.4% 265
Educational DP Contest AtCoder M - Candies Uncategorized 12 34.2% 265
Self-deception Uncategorized 15 21.6% 264
DMOPC '19 Contest 7 P1 - Hydrocarbons DMOPC 7 45.3% 264