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
...
36
37
38
39
40
41
...
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 '95 P4 - Wildcard
Max's Anger Contest Series 2 P3 - Array Anger
Pick It
Cheerio Contest 1 S2 - School Expansion
CCC '24 S2 - Heavy-Light Composition
Max's Anger Contest Series 2 P2 - Password Anger
Appleby Contest '19 P5 - Matrix Operation
Problem
Category
Points
AC %
▾
Users
Carnival Game
Uncategorized
7
28.3%
59
Love Evenness
Uncategorized
5
50.7%
96
BSSPC '21 S2 - Hacker Soup
Uncategorized
7p
30.3%
148
Dream and the Multiverse
Uncategorized
50p
5.2%
2
BSSPC '21 S1 - Lakshy and Palindromic Rectangle
Uncategorized
5p
19.8%
184
SAC '22 Code Challenge 4 P4 - Obligatory Subarray Problem
SAC Coding Challenge
10p
22.6%
91
SAC '22 Code Challenge 4 P3 - Obligatory Math Problem
SAC Coding Challenge
5
38.6%
206
MALD Contest 1 P2 - Scratch Cat and Examinations
Uncategorized
5p
30.9%
121
DMOPC '21 Contest 2 P6 - Strange Function
DMOPC
30p
13.2%
10
DMOPC '21 Contest 2 P1 - Bosses
DMOPC
7p
18.1%
260
DMOPC '21 Contest 2 P3 - Divisions
DMOPC
12p
8.8%
78
DMOPC '21 Contest 3 P2 - Weak Data
DMOPC
10p
11.9%
160
DMOPC '21 Contest 3 P4 - Sorting Subsequences
DMOPC
20p
14.2%
32
DMOPC '21 Contest 2 P4 - Water Mechanics
DMOPC
15p
23.4%
56
DMOPC '21 Contest 2 P2 - Scrambling Swaps
DMOPC
7p
23.8%
184
An Animal Contest 4 P2 - Lavish Lights
AAC
10
14.4%
210
COCI '21 Contest 1 #1 Ljeto
COCI
5p
42.4%
113
COCI '21 Contest 1 #2 Kamenčići
COCI
10p
30.6%
66
COCI '21 Contest 1 #3 Logičari
COCI
17p
24.1%
41
COCI '21 Contest 1 #4 Set
COCI
35p
23.7%
9
COCI '21 Contest 1 #5 Volontiranje
COCI
25p
20.2%
19
An Animal Contest 4 P3 - Snowy Slopes
AAC
10
20.6%
135
An Animal Contest 4 P1 - Dasher's Digits
AAC
5p
21.2%
312
Mock CCC '22 1 S1 - Big Mattress Tournament
Mock CCC
5p
13.4%
206
Mock CCC '22 1 S2 - IU
Mock CCC
5p
21.4%
185
Mock CCC '22 1 S4 - Berkeley Math Tournament Statistics
Mock CCC
20p
8.7%
31
Mock CCC '22 1 S3 - IU
Mock CCC
7p
40.0%
194
Mock CCC '22 1 S5 - Berkeley Math Tournament Awards Ceremony
Mock CCC
35p
5.5%
7
Expected Inversions
Uncategorized
12p
33.1%
24
DMOPC '21 Contest 3 P3 - Hopping Frogs
DMOPC
15p
21.9%
53
DMOPC '21 Contest 3 P6 - Good Grids
DMOPC
30p
10.0%
7
DMOPC '21 Contest 3 P1 - Sums & Differences
DMOPC
7p
18.0%
205
SAC '22 Code Challenge 5 P4 - Querying Intervals
SAC Coding Challenge
10p
35.9%
118
Spring Coding Bowl '22 P1 - Student Numbers
Uncategorized
3
19.0%
79
SAC '22 Code Challenge 5 P5 - Querying Rectangles
SAC Coding Challenge
15p
15.7%
36
Baltic OI '09 P1 - Beetle
Baltic OI
15
34.4%
39
Baltic OI '09 P2 - Candy Machine
Baltic OI
12p
37.1%
20
SAC '22 Code Challenge 5 P3 - Querying Presents
SAC Coding Challenge
7p
51.0%
105
SAC '22 Code Challenge 5 P2 - Querying Extensions
SAC Coding Challenge
5p
74.2%
310
SAC '22 Code Challenge 5 P1 - Querying Plants
SAC Coding Challenge
3
65.6%
227
Baltic OI '09 P4 - Rectangle
Baltic OI
10p
12.1%
18
Baltic OI '09 P3 - Subway Signaling Error
Baltic OI
12p
36.4%
4
Baltic OI '09 P5 - Triangulation
Baltic OI
20p
36.5%
9
MALD Contest 1 P1 - Scratch Cat and DDoS
Uncategorized
3
24.3%
145
Baltic OI '09 P6 - Monument
Baltic OI
17
8.6%
6
COCI '21 Contest 2 #1 Kaučuk
COCI
5p
73.9%
91
COCI '21 Contest 2 #2 Kutije
COCI
10p
44.2%
86
MALD Contest 1 P3 - Scratch Cat and Infestation
Uncategorized
7
13.0%
61
MALD Contest 1 P4 - Scratch Cat and Demolition
Uncategorized
15p
33.6%
51
DMOPC '21 Contest 4 P4 - Christmas Graph
DMOPC
17p
32.4%
40
«
1
2
...
36
37
38
39
40
41
...
99
100
»