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 S2 - Modern Art
Baltic OI '17 P5 - Plus Minus
IOI '11 P4 - Crocodile's Underground City
COCI '08 Contest 3 #1 Pet
Big Deposits
COCI '08 Contest 3 #2 Kemija
Arcadia Computing Contest 1 P3 - ScanTron
Problem
Category
Points
AC %
Users
DMOPC '21 Contest 1 P4 - Uneven Forest
DMOPC
20
27.9%
49
DMOPC '21 Contest 1 P5 - Perfect Cross
DMOPC
25p
8.9%
10
DMOPC '21 Contest 1 P6 - Tree Jumping
DMOPC
25p
24.3%
12
DMOPC '21 Contest 2 P1 - Bosses
DMOPC
7p
17.8%
262
DMOPC '21 Contest 2 P2 - Scrambling Swaps
DMOPC
7p
23.8%
186
DMOPC '21 Contest 2 P3 - Divisions
DMOPC
12p
8.8%
78
DMOPC '21 Contest 2 P4 - Water Mechanics
DMOPC
15p
23.4%
56
DMOPC '21 Contest 2 P5 - Permutations
DMOPC
25p
16.0%
16
DMOPC '21 Contest 2 P6 - Strange Function
DMOPC
30p
13.6%
11
DMOPC '21 Contest 3 P1 - Sums & Differences
DMOPC
7p
18.1%
209
DMOPC '21 Contest 3 P2 - Weak Data
DMOPC
10p
11.4%
176
DMOPC '21 Contest 3 P3 - Hopping Frogs
DMOPC
15p
21.9%
53
DMOPC '21 Contest 3 P4 - Sorting Subsequences
DMOPC
20p
14.5%
34
DMOPC '21 Contest 3 P5 - Crowded Travels
DMOPC
20p
21.0%
19
DMOPC '21 Contest 3 P6 - Good Grids
DMOPC
30p
10.3%
8
DMOPC '21 Contest 4 P1 - Tree Shopping
DMOPC
7
16.5%
163
DMOPC '21 Contest 4 P2 - Festive Groups
DMOPC
7p
21.3%
211
DMOPC '21 Contest 4 P3 - Palindromic Presents
DMOPC
12p
22.5%
170
DMOPC '21 Contest 4 P4 - Christmas Graph
DMOPC
17p
32.4%
40
DMOPC '21 Contest 4 P5 - Graph Generator
DMOPC
20p
16.0%
17
DMOPC '21 Contest 4 P6 - Balanced Line
DMOPC
35p
5.1%
5
DMOPC '21 Contest 5 P1 - Permutations & Primes
DMOPC
5p
22.3%
423
DMOPC '21 Contest 5 P2 - Permutations & Primes
DMOPC
7
31.7%
346
DMOPC '21 Contest 5 P3 - Permutations & Primes
DMOPC
12p
16.1%
152
DMOPC '21 Contest 5 P4 - Permutations & Primes
DMOPC
17p
11.8%
71
DMOPC '21 Contest 5 P5 - Permutations & Primes
DMOPC
30p
11.0%
26
DMOPC '21 Contest 5 P5 - Permutations & Primes (Hard Version)
DMOPC
40p
3.8%
3
DMOPC '21 Contest 5 P6 - Permutations & Primes
DMOPC
25p
6.2%
22
DMOPC '21 Contest 6 P1 - Bigger Big Integer
DMOPC
3p
48.2%
512
DMOPC '21 Contest 6 P2 - Gacha Luck
DMOPC
7p
29.2%
298
DMOPC '21 Contest 6 P3 - An Art Problem
DMOPC
10p
22.2%
267
DMOPC '21 Contest 6 P4 - Colourful Paths
DMOPC
15p
9.1%
100
DMOPC '21 Contest 6 P5 - Contraband Game
DMOPC
25p
6.2%
13
DMOPC '21 Contest 7 P1 - Chika Grids
DMOPC
5p
26.5%
292
DMOPC '21 Contest 7 P2 - Knitting Scarves
DMOPC
7
23.1%
200
DMOPC '21 Contest 7 P3 - Whack-an-Ishigami
DMOPC
12p
13.7%
83
DMOPC '21 Contest 7 P4 - Rocket Race
DMOPC
17p
7.7%
36
DMOPC '21 Contest 7 P5 - King's Commands
DMOPC
35p
6.4%
7
DMOPC '21 Contest 7 P6 - Rainbow Subgraphs
DMOPC
30p
15.4%
10
DMOPC '21 Contest 8 P1 - Peanut Planning
DMOPC
7p
20.2%
236
DMOPC '21 Contest 8 P2 - Kanna Market
DMOPC
10p
21.3%
146
DMOPC '21 Contest 8 P3 - Weaker Data
DMOPC
25p
6.3%
16
DMOPC '21 Contest 8 P4 - Grid Operations
DMOPC
25p
16.5%
19
DMOPC '21 Contest 8 P5 - Tree Building
DMOPC
25p
9.5%
35
DMOPC '21 Contest 8 P6 - Castle Building
DMOPC
40p
9.2%
17
DMOPC '21 Contest 9 P1 - Board Numbers
DMOPC
7p
17.9%
187
DMOPC '21 Contest 9 P2 - String Puzzle
DMOPC
7p
24.6%
163
DMOPC '21 Contest 9 P3 - Terrible Trains
DMOPC
12p
23.4%
97
DMOPC '21 Contest 9 P4 - Ace of Diamonds
DMOPC
20p
20.2%
46
DMOPC '21 Contest 9 P5 - Chika Circle
DMOPC
20p
11.8%
26
«
1
2
3
4
5
6
7
8
»