Problems

Problem search

Point range
Go Random

Hot problems

Problem Category ▴ Types Points AC % Users
IOI '05 P6 - Rivers IOI Dynamic Programming 20p 29.9% 283
IOI '07 P4 - Miners IOI Dynamic Programming 15p 21.3% 444
IOI '09 P8 - Salesman IOI Data Structures, Dynamic Programming 25p 16.8% 133
IOI '95 Practice Task 3 - Bar Codes IOI Dynamic Programming 12p 35.4% 23
IOI '96 P1 - A Game IOI Dynamic Programming, Game Theory 10 39.3% 268
IOI '96 P5 - Longest Prefix IOI Dynamic Programming 12 20.8% 112
IOI '98 P6 - Polygon IOI Dynamic Programming 15 32.0% 61
IOI '99 P1 - Little Shop of Flowers IOI Dynamic Programming 10 30.6% 204
IOI '00 P5 - Post Office IOI Dynamic Programming 15p 40.6% 183
IOI '05 P1 - Garden IOI Dynamic Programming 20p 21.7% 252
IOI '04 P4 - Phidias IOI Dynamic Programming 10p 53.5% 885
IOI '07 P6 - Training IOI Dynamic Programming, Graph Theory 40p 27.9% 67
IOI '08 P2 - Islands IOI Dynamic Programming, Graph Theory 25p 10.4% 111
IOI '14 Practice Task 1 - Square IOI Dynamic Programming 10p 44.3% 179
IOI '06 P4 - The Valley of Mexico IOI Dynamic Programming 15p 22.0% 214
IOI '16 P6 - Aliens (Standard I/O) IOI Dynamic Programming 30p 6.1% 63
IOI '20 P4 - Packing Biscuits IOI Dynamic Programming, Simple Math 25p 13.4% 15
IOI '22 P1 - Catfish Farm IOI Data Structures, Dynamic Programming 25p 8.1% 44
IOI '23 P1 - Closing Time IOI Dynamic Programming, Graph Theory, Greedy Algorithms 25p 4.6% 20
IOI '23 P3 - Soccer Stadium IOI Dynamic Programming 30p 4.7% 12
JOI '14 Open P5 - Pinball JOI Data Structures, Dynamic Programming 25p 26.3% 91
JOI '13 Open P3 - Watching JOI Dynamic Programming 15p 29.7% 90
JOI '16 Open P3 - Skyscraper JOI Dynamic Programming 25p 41.9% 46
JOI '19 Final P3 - Collecting Stamps 3 JOI Dynamic Programming 15 25.4% 39
JOI '18 Spring Camp Day 1 P3 - Tents JOI Dynamic Programming, Intermediate Math 20p 71.1% 28
JOI '21 Open P2 - Financial Report JOI Dynamic Programming 25p 34.0% 13
JOI '22 Open P2 - Giraffes JOI Dynamic Programming 35p 0.0% 0
JOI '20 Open P3 - Power Plant JOI Dynamic Programming, Graph Theory 15p 39.8% 23
Mock CCC '15 S4 - Ice Pillars Mock CCC Dynamic Programming 15p 29.0% 106
Mock CCC '18 Contest 2 J5/S3 - A Coloring Problem Mock CCC Dynamic Programming 10p 19.3% 56
Mock CCC '18 Contest 1 S5 - A Palindrome Problem Mock CCC Dynamic Programming 15p 8.5% 18
Valentine's Day '18 S3 - Carol's Cactesian Conquest Mock CCC Dynamic Programming 17p 40.6% 35
Mock CCC '19 Contest 1 J5 - Pusheen Designs a Sushi Boat Mock CCC Dynamic Programming 7p 17.1% 235
Mock CCC '19 Contest 1 S4 - Pusheen Plays Neko Atsume Mock CCC Dynamic Programming 12 17.8% 100
Riolku's Mock CCC S4 - Clumsy Cindy Mock CCC Dynamic Programming 12p 10.7% 70
Mock CCC '22 2 S5 - Kaguya Wants to go Window Shopping with Kei Shirogane Mock CCC Dynamic Programming 30p 5.5% 5
Mock CCC '22 Contest 2 J5 - Dominating the Olympics Mock CCC Dynamic Programming, Graph Theory 10 16.0% 76
Mock CCC '24 Contest 1 S5 - Mock CCC 2025 Mock CCC Dynamic Programming 20p 14.2% 18
CCO Preparation Test 2 P3 - Subsets Mock CCO Ad Hoc, Dynamic Programming 20p 16.7% 39
CCO Preparation Test 3 P2 - Packing Up Mock CCO Dynamic Programming 25p 14.9% 117
CCO Preparation Test 5 P1 - City Game Mock CCO Dynamic Programming 15 26.4% 202
CCO Preparation Test 6 P2 - An Easy Problem Mock CCO Dynamic Programming 12p 32.5% 204
Mock CCO '17 Problem 6 - Dire Consequences Mock CCO Data Structures, Dynamic Programming 20 24.2% 25
Mock CCO '18 Contest 2 Problem 1 - Victor Runs Mock CCO Dynamic Programming 15p 16.5% 44
Mock CCO '18 Contest 2 Problem 6 - Victor's Cubes Mock CCO Dynamic Programming 20p 18.3% 9
Mock CCO '18 Contest 3 Problem 5 - Roger Outsources DMOJ Work Mock CCO Dynamic Programming 15p 11.2% 8
Mock CCO '18 Contest 4 Problem 2 - Sunken Colonies Mock CCO Dynamic Programming 15p 43.5% 38
Mock CCO '18 Contest 4 Problem 5 - Spawn More Overlords Mock CCO Dynamic Programming 20p 24.8% 35
Mock CCO '19 Contest 2 Problem 6 - A Fundraising Problem Mock CCO Dynamic Programming, Graph Theory 12p 15.8% 28
MWC '15 #7 P3: Blue and Green MWC Dynamic Programming 15p 14.9% 37