Home
Problems
Submissions
Users
Contests
About
>
Status
Tips
API
Github
Log in
or
Sign up
This site works best with JavaScript enabled.
Problems
«
1
2
3
4
5
6
7
8
»
Problem search
Full text search
Has editorial
Show problem types
Category
All
---
AAC
ACC
APIO
Balkan OI
Baltic OI
BlueBook
Brazil OI
Bubble Cup
Bulgarian OI
CCC
CCO
CEOI
China NOI
Classics
COCI
CSPC
CTF
Data Structure Tests
DMOPC
DWITE
ECOO
EGOI
ESOI
FHC
Fun Math
GFSSOC
Google Code Jam
Google Hash Code
Google Kick Start
ICPC
IOI
JOI
Mock CCC
Mock CCO
MWC
Olympiads School
POI
SAC Coding Challenge
Seasonal
SIUCF
Taiwan NOI
TLE
TSOC
Uncategorized
VM7WC
WAC
Waterloo Local
Woburn Challenge
YAC
Point range
Go
Random
Hot problems
CCC '21 J3 - Secret Instructions
DMOPC '20 Contest 4 P1 - Missing Numbers
CCC '24 S2 - Heavy-Light Composition
CCC '12 S3 - Absolutely Acidic
COCI '06 Regional #3 Firefly
ECOO '19 R1 P1 - Free Shirts
ACSL '09 Practice P4 - Rank
Problem
Category ▴
Points
AC %
Users
DMOPC '16 Contest 1 P3 - Shoe Shopping
DMOPC
7
22.5%
423
DMOPC '16 Contest 1 P6 - Phantom Child
DMOPC
20p
13.5%
9
DMOPC '16 Contest 1 P1 - A New Chapter
DMOPC
3p
42.3%
350
DMOPC '16 Contest 1 P4 - Tree Appraisal
DMOPC
15p
36.7%
68
DMOPC '16 Contest 2 P6 - Console Simulator 2017
DMOPC
12p
12.0%
26
DMOPC '16 Contest 2 P5 - Tormented in Tartarus
DMOPC
15p
8.4%
24
DMOPC '16 Contest 2 P4 - Zeros
DMOPC
7p
12.1%
175
DMOPC '16 Contest 2 P1 - Seed Strategy
DMOPC
3
45.6%
335
DMOPC '16 Contest 2 P2 - Ebola Outbreak
DMOPC
7p
20.5%
432
DMOPC '16 Contest 2 P3 - Queries
DMOPC
7
49.8%
157
DMOPC '16 Contest 3 P5 - Shoe Shopping II
DMOPC
15p
31.3%
19
DMOPC '16 Contest 3 P3 - Phantom Fight
DMOPC
10p
14.1%
98
DMOPC '16 Contest 3 P1 - Leading Basic Shots
DMOPC
3
54.5%
422
DMOPC '16 Contest 3 P0 - Negative Feedback
DMOPC
3
63.1%
506
DMOPC '16 Contest 3 P4 - Serpent's Search
DMOPC
17p
0.6%
1
DMOPC '16 Contest 3 P6 - Long Lost Love
DMOPC
17p
18.9%
37
DMOPC '16 Contest 3 P2 - Starstruck Squeeze
DMOPC
10p
8.8%
106
DMOPC '16 Contest 4 P2 - Systests
DMOPC
7p
18.6%
383
DMOPC '16 Contest 4 P3 - Carnival Phantasm
DMOPC
10
19.2%
239
DMOPC '16 Contest 4 P1 - Fast Exponents
DMOPC
5p
26.4%
558
DMOPC '16 Contest 4 P4 - Molly and Manga Shopping
DMOPC
15p
25.3%
147
DMOPC '16 Contest 4 P6 - Molly and Flying Drones
DMOPC
15p
19.8%
150
DMOPC '16 Contest 4 P5 - Migrant Mascot
DMOPC
10p
21.6%
315
DMOPC '17 Contest 2 P2 - Balance
DMOPC
5p
16.6%
316
DMOPC '17 Contest 1 P1 - Fujō Neko
DMOPC
5p
25.8%
620
DMOPC '17 Contest 1 P6 - Land of the Carrot Trees
DMOPC
20p
19.6%
38
DMOPC '17 Contest 1 P5 - Intimidating Arrays
DMOPC
15p
33.0%
118
DMOPC '17 Contest 3 P4 - Solitaire Logic
DMOPC
10p
28.4%
17
DMOPC '17 Contest 1 P2 - Sharing Crayons
DMOPC
7p
18.0%
235
DMOPC '17 Contest 1 P4 - Quests
DMOPC
12p
20.8%
289
DMOPC '17 Contest 1 P3 - Hitchhiking Fun
DMOPC
7p
23.1%
335
DMOPC '17 Contest 2 P3 - Bad Bunnies
DMOPC
10p
25.0%
382
DMOPC '17 Contest 2 P5 - Game
DMOPC
20p
15.4%
9
DMOPC '17 Contest 2 P1 - 0-1 Knapsack
DMOPC
3
28.9%
373
DMOPC '17 Contest 2 P4 - Mimi and Dictionary
DMOPC
12p
21.6%
83
DMOPC '17 Contest 2 P0 - Secrets
DMOPC
3
33.4%
432
DMOPC '17 Contest 4 P6 - Best Girl
DMOPC
25p
15.4%
10
DMOPC '17 Contest 2 P6 - Lazy Days
DMOPC
15p
15.4%
36
DMOPC '17 Contest 3 P6 - Mimi and Scarf
DMOPC
25p
7.3%
15
DMOPC '20 Contest 6 P4 - Land of the Carrot Trees II
DMOPC
17p
19.7%
36
DMOPC '17 Contest 3 P5 - Picnic Planning
DMOPC
15
23.5%
14
DMOPC '17 Contest 3 P3 - N-Kat
DMOPC
10p
18.9%
84
DMOPC '17 Contest 3 P0 - 2-Satisfiability
DMOPC
3
50.2%
325
DMOPC '17 Contest 3 P2 - Towers of Hanoi
DMOPC
7p
18.2%
82
DMOPC '17 Contest 3 P1 - An Early Christmas Present
DMOPC
3p
62.4%
449
DMOPC '17 Contest 4 P4 - Cops and Robbers
DMOPC
7p
20.9%
208
DMOPC '17 Contest 4 P0 - Catch
DMOPC
3
24.9%
197
DMOPC '17 Contest 4 P2 - A Heavy Light Decomposition Problem
DMOPC
7p
12.3%
119
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
DMOPC
5p
30.3%
292
DMOPC '17 Contest 4 P5 - Revised IOI
DMOPC
12
28.8%
38
«
1
2
3
4
5
6
7
8
»