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
...
52
53
54
55
56
57
...
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
WC '01 P3 - Back to the Future
DWITE '10 R3 #3 - Dominos Tiling
GFSSOC '15 Winter S1 - OR-deal
APIO '10 P1 - Commando
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
Counting Subsequences
IOI '11 P3 - Rice Hub
Problem
Category
Points
AC %
▾
Users
MMCC '15 P3 - Momoka
Uncategorized
25p
11.1%
9
Next Prime (Hard)
Classics
15
7.9%
159
Hailstone Numbers
Uncategorized
3
57.0%
807
Sword Art Online Judge
Seasonal
7
14.0%
101
Death Gun
Seasonal
7p
23.8%
294
Scroll
Seasonal
0
55.5%
2248
Sword Art Online Judge 2
Seasonal
10
6.1%
62
Sword Art Online Judge 3
Seasonal
7
13.1%
33
Perl Golf
Uncategorized
15p
11.3%
41
ECOO '15 R1 P3 - Ten Pin Trig
ECOO
10p
37.4%
41
ECOO '15 R1 P4 - Neanderthal Numbers
ECOO
10p
34.0%
208
ECOO '15 R1 P2 - Word Wrap
ECOO
10p
24.0%
144
ECOO '15 R1 P1 - When You Eat Your Smarties
ECOO
5p
24.6%
1107
NO ACM NO LIFE
Uncategorized
30p
22.4%
41
DMOPC '14 Contest 7 P2 - Tides
DMOPC
5p
19.1%
729
Prime Factorization
Uncategorized
5
25.2%
904
TSOC '15 Contest 2 #3 - Funny Anagrams
TSOC
7
10.1%
39
TSOC '15 Contest 2 #6 - All-Out War!
TSOC
15p
9.6%
70
TSOC '15 Contest 2 #4 - Dungeon Crawling
TSOC
10
36.3%
80
Touching Segments
Uncategorized
20p
21.3%
86
DMPG '17 S4 - Artillery Battery
DMOPC
15p
8.7%
8
CCO Preparation Test 3 P1 - Primitive Pythagorean Pairs
Mock CCO
25p
13.7%
20
CCO Preparation Test 3 P2 - Packing Up
Mock CCO
25p
14.9%
117
CCO Preparation Test 3 P3 - Arrow
Mock CCO
30p
17.7%
58
DMOPC '14 Contest 7 P6 - Revenge of the Bins
DMOPC
20p
32.8%
115
Rotations in 3 Dimensions
Uncategorized
12
29.6%
119
CCC '01 J1 - Dressing Up
CCC
3
48.2%
2877
CCC '01 J2 - Mod Inverse
CCC
3
42.9%
2539
A Noisy Class
Uncategorized
7
29.4%
752
DMOPC '14 Contest 7 P3 - Globally Unique Shells
DMOPC
5p
33.5%
238
DMOPC '14 Contest 7 P4 - Sand Triangle
DMOPC
7p
37.4%
220
Largest Permutation
Uncategorized
7p
19.6%
262
DMPG '15 B4 - Maximum Product
DMOPC
7p
18.3%
321
Word Scrambler
Uncategorized
5
49.7%
725
DMPG '15 B3 - Picking Berries
DMOPC
3p
26.7%
162
DMPG '15 B1 - Loner Phoner
DMOPC
3p
31.8%
347
DMPG '15 S5 - Black and White
DMOPC
12p
25.2%
446
DMPG '15 S2 - MMORPG
DMOPC
5p
12.4%
127
DMPG '15 B2 - Trunk in Trunk
DMOPC
5p
27.7%
212
DMPG '15 S1 - Collecting Dust
DMOPC
5
38.5%
272
DMPG '15 S4 - Signal Hill
DMOPC
10
17.0%
176
DMPG '15 S3 - Zen Garden
DMOPC
7p
36.2%
295
CCO '15 P1 - Hungry Fox
CCO
15p
21.6%
221
CCO '15 P2 - Artskjid
CCO
15p
15.4%
504
CCO '15 P3 - Solar Flight
CCO
20p
12.8%
68
CCO '15 P4 - Cars on Ice
CCO
10p
18.8%
208
CCO '15 P5 - Timpanist
CCO
20p
36.5%
102
CCO '15 P6 - Eggscavation
CCO
30p
18.5%
70
DMPG '15 G1 - Marcia and Maze
DMOPC
10p
26.8%
112
DMPG '15 G2 - 1-String B2-VPG Representation of Planar Graphs
DMOPC
15p
18.4%
30
«
1
2
...
52
53
54
55
56
57
...
99
100
»