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
...
43
44
45
46
47
48
...
99
100
»
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 '19 S2 - Pretty Average Primes
UACC 1 P3 - Cheeky Checkers
IOI '06 P2 - Pyramid
Lil' Jami
CCC '24 J5 - Harvest Waterloo
COCI '10 Contest 2 #2 Napor
Factors
Problem
Category ▴
Points
AC %
Users
DMOPC '22 Contest 4 P3 - K-Knight
DMOPC
15
16.0%
42
DMOPC '22 Contest 2 P2 - Line Trace
DMOPC
7p
34.1%
167
DMOPC '22 Contest 4 P2 - Fake Painting
DMOPC
10p
18.5%
89
DMOPC '22 Contest 3 P5 - Alice Rebalancing
DMOPC
20p
7.3%
28
DMOPC '22 Contest 3 P2 - New Components
DMOPC
10p
17.9%
161
DMOPC '22 Contest 3 P4 - Sketchy Cereal
DMOPC
30p
4.9%
22
DMOPC '22 Contest 3 P1 - Holiday Colouring
DMOPC
5p
21.5%
373
DMOPC '22 Contest 4 P5 - Blackboard Game
DMOPC
17p
12.2%
36
DMOPC '22 Contest 4 P6 - K-Sort
DMOPC
30p
5.4%
5
DMOPC '22 Contest 4 P4 - Anki Reviews
DMOPC
17p
13.7%
36
DMOPC '22 Contest 4 P1 - Alone Time
DMOPC
5p
14.2%
179
DMOPC '22 Contest 5 P5 - Twos and Threes
DMOPC
25
18.0%
17
DMOPC '22 Contest 5 P6 - Threes and Twos
DMOPC
20p
20.0%
54
DMOPC '22 Contest 5 P1 - Triple Triplets
DMOPC
5p
23.7%
227
DMOPC '22 Contest 5 P2 - Absolutely Even
DMOPC
7p
19.3%
164
DMOPC '22 Contest 5 P3 - Sorted XOR
DMOPC
12p
15.9%
68
DMOPC '22 Contest 5 P4 - Ricochet
DMOPC
17p
7.8%
22
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 P1 - Peak Grid
DMOPC
5p
55.4%
361
DMOPC '23 Contest 1 P2 - Knights on Chessboard
DMOPC
10p
14.1%
197
DMOPC '23 Contest 1 P3 - Colour Scheme
DMOPC
12p
10.8%
86
DMOPC '23 Contest 1 P4 - Wandering Walk
DMOPC
17p
6.4%
54
Binary Indexed Tree Test
Data Structure Tests
10p
28.8%
740
Disjoint Set Test
Data Structure Tests
10
36.9%
881
Segment Tree Test
Data Structure Tests
15p
15.6%
341
Binary Search Tree Test
Data Structure Tests
15
38.6%
196
Heap Dijkstra Revisited
Data Structure Tests
10
14.3%
10
Dynamic Tree Test
Data Structure Tests
45
30.0%
32
Dynamic Tree Test (Easy)
Data Structure Tests
25p
34.0%
52
String Test
Data Structure Tests
50
3.4%
2
Strict Evaluation
Data Structure Tests
17
22.2%
143
DWITE '08 R5 #3 - Working Directory
DWITE
7
45.9%
16
DWITE '11 R5 #3 - Unit rectangles
DWITE
3
51.7%
71
DWITE '07 R1 #1 - Vanilla Primes
DWITE
3
24.6%
646
DWITE '09 R2 #4 - Breadth First Not Quite Tree
DWITE
5
33.4%
150
DWITE '09 R2 #5 - Portals Redux
DWITE
12
39.7%
23
DWITE '10 R1 #5 - Ricochet Robot
DWITE
7
42.1%
19
DWITE '12 R2 #2 - Word Arithmetic
DWITE
5
30.9%
18
DWITE '11 R2 #4 - Bear Trees
DWITE
10
21.6%
19
DWITE '07 R1 #4 - Stacks of Blocks
DWITE
5
36.3%
255
DWITE '09 R7 #5 - Snapper Chain
DWITE
10
51.1%
74
DWITE '07 R4 #1 - Curve-shot
DWITE
5
56.1%
32
DWITE '12 R5 #3 - Triangle Count
DWITE
7
33.4%
162
DWITE '07 R5 #4 - Train ride
DWITE
7
53.4%
37
DWITE '08 R4 #1 - Four player Pong with no players
DWITE
7
71.9%
58
DWITE '07 R5 #3 - Parity bit
DWITE
5
71.0%
102
DWITE '12 R1 #3 - Costume Party
DWITE
5
43.7%
50
DWITE '09 R7 #2 - Sum of Primes
DWITE
5
55.3%
348
DWITE '09 R4 #3 - Moving at the same time
DWITE
5
31.2%
57
«
1
2
...
43
44
45
46
47
48
...
99
100
»