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
COCI '14 Contest 6 #4 Kratki
ACSL '09 Practice P4 - Rank
IOI '00 P1 - Palindrome
CCC '17 S3 - Nailed It!
DMOPC '14 Contest 4 P3 - Golden Lily
DMOPC '17 Contest 4 P4 - Cops and Robbers
COCI '10 Contest 2 #2 Napor
Problem ▾
Category
Points
AC %
Users
The Contest Contest 1 P6 - A Typical DMOPC Problem
Uncategorized
30p
1.0%
2
DMOPC '23 Contest 1 P6 - Sky Clearing Up
DMOPC
35p
14.6%
4
DMOPC '23 Contest 1 P5 - Perfect Matching
DMOPC
25p
11.5%
14
DMOPC '23 Contest 1 P4 - Wandering Walk
DMOPC
17p
6.4%
54
DMOPC '23 Contest 1 P3 - Colour Scheme
DMOPC
12p
10.8%
86
DMOPC '23 Contest 1 P2 - Knights on Chessboard
DMOPC
10p
14.1%
197
DMOPC '23 Contest 1 P1 - Peak Grid
DMOPC
5p
55.4%
361
DMOPC '22 Contest 5 P6 - Threes and Twos
DMOPC
20p
20.0%
54
DMOPC '22 Contest 5 P5 - Twos and Threes
DMOPC
25
18.0%
17
DMOPC '22 Contest 5 P4 - Ricochet
DMOPC
17p
7.8%
22
DMOPC '22 Contest 5 P3 - Sorted XOR
DMOPC
12p
15.9%
68
DMOPC '22 Contest 5 P2 - Absolutely Even
DMOPC
7p
19.3%
164
DMOPC '22 Contest 5 P1 - Triple Triplets
DMOPC
5p
23.7%
227
DMOPC '22 Contest 4 P6 - K-Sort
DMOPC
30p
5.4%
5
DMOPC '22 Contest 4 P5 - Blackboard Game
DMOPC
17p
12.2%
36
DMOPC '22 Contest 4 P4 - Anki Reviews
DMOPC
17p
13.7%
36
DMOPC '22 Contest 4 P3 - K-Knight
DMOPC
15
16.0%
42
DMOPC '22 Contest 4 P2 - Fake Painting
DMOPC
10p
18.5%
89
DMOPC '22 Contest 4 P1 - Alone Time
DMOPC
5p
14.2%
179
DMOPC '22 Contest 3 P6 - Compressibility
DMOPC
25p
8.0%
19
DMOPC '22 Contest 3 P5 - Alice Rebalancing
DMOPC
20p
7.3%
28
DMOPC '22 Contest 3 P4 - Sketchy Cereal
DMOPC
30p
4.9%
22
DMOPC '22 Contest 3 P3 - Ina's Takodachis
DMOPC
15p
5.7%
58
DMOPC '22 Contest 3 P2 - New Components
DMOPC
10p
17.9%
161
DMOPC '22 Contest 3 P1 - Holiday Colouring
DMOPC
5p
21.5%
373
DMOPC '22 Contest 2 P6 - Yogyakarta Elevators
DMOPC
25p
9.1%
32
DMOPC '22 Contest 2 P5 - Beautiful Bins
DMOPC
30
8.2%
11
DMOPC '22 Contest 2 P4 - Falling Leaves
DMOPC
20p
24.3%
28
DMOPC '22 Contest 2 P3 - Good Permutations
DMOPC
12p
20.0%
122
DMOPC '22 Contest 2 P2 - Line Trace
DMOPC
7p
34.1%
167
DMOPC '22 Contest 2 P1 - DMOPC Crisis
DMOPC
5p
15.5%
313
DMOPC '22 Contest 1 P6 - Linear Swap
DMOPC
30p
7.8%
9
DMOPC '22 Contest 1 P5 - Wesley's Cabins
DMOPC
30p
5.7%
7
DMOPC '22 Contest 1 P4 - Card Game
DMOPC
12p
15.9%
63
DMOPC '22 Contest 1 P3 - Group Project
DMOPC
12p
14.0%
95
DMOPC '22 Contest 1 P2 - Hat Swap
DMOPC
10p
24.0%
228
DMOPC '22 Contest 1 P1 - Up-down Sequence
DMOPC
5p
24.9%
263
DMOPC '21 Contest 9 P6 - Shortest Paths
DMOPC
30p
33.3%
10
DMOPC '21 Contest 9 P5 - Chika Circle
DMOPC
20p
11.4%
25
DMOPC '21 Contest 9 P4 - Ace of Diamonds
DMOPC
20p
20.0%
43
DMOPC '21 Contest 9 P3 - Terrible Trains
DMOPC
12p
22.2%
81
DMOPC '21 Contest 9 P2 - String Puzzle
DMOPC
7p
24.7%
152
DMOPC '21 Contest 9 P1 - Board Numbers
DMOPC
7p
17.5%
179
DMOPC '21 Contest 8 P6 - Castle Building
DMOPC
40p
8.7%
15
DMOPC '21 Contest 8 P5 - Tree Building
DMOPC
25p
9.2%
33
DMOPC '21 Contest 8 P4 - Grid Operations
DMOPC
25p
15.9%
17
DMOPC '21 Contest 8 P3 - Weaker Data
DMOPC
25p
6.0%
15
DMOPC '21 Contest 8 P2 - Kanna Market
DMOPC
10p
21.8%
136
DMOPC '21 Contest 8 P1 - Peanut Planning
DMOPC
7p
19.7%
212
DMOPC '21 Contest 7 P6 - Rainbow Subgraphs
DMOPC
30p
14.6%
8
«
1
2
3
4
5
6
7
8
»