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
...
34
35
36
37
38
39
...
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 '16 S4 - Combining Riceballs
Appleby Contest '19 P5 - Matrix Operation
Cheerio Contest 1 S2 - School Expansion
CCO '07 P2 - Snowflakes
WC '96 P6 - Bases Multiplication
DMOPC '23 Contest 1 P1 - Peak Grid
Max's Anger Contest Series 2 P3 - Array Anger
Problem
Category
Points
AC %
▾
Users
Canada Day Contest 2021 - Fine Art
Seasonal
7
26.9%
127
Canada Day Contest 2021 - CCC Bad Haha
Seasonal
12
36.2%
248
Canada Day Contest 2021 - Starfall
Seasonal
15
32.4%
112
SAC '21 Code Challenge P5 - Friends of Friends
SAC Coding Challenge
7p
22.2%
255
SAC '21 Code Challenge P4 - Averaging Averages
SAC Coding Challenge
5p
26.8%
203
An Animal Contest 2 P5 - Koala Carnival
AAC
15p
34.8%
98
An Animal Contest 2 P6 - Koala Transport System
AAC
17p
22.2%
61
An Animal Contest 2 P2 - Koala Party
AAC
5p
16.5%
292
SAC '21 Code Challenge P3 - DeMello's Replacement
SAC Coding Challenge
5
19.5%
201
Marcus Approximation
Uncategorized
12p
33.3%
43
An Animal Contest 2 P4 - Koala Gambling
AAC
12
19.8%
197
An Animal Contest 2 P1 - Koala Konundrum
AAC
5
44.5%
492
Koala Ball
Uncategorized
12p
32.2%
14
DMOPC '20 Contest 5 P6 - Top Row
DMOPC
35p
3.1%
5
DMOPC '20 Contest 5 P5 - Slacking Off Again
DMOPC
20p
17.6%
32
DMOPC '20 Contest 5 P4 - Slacking Off
DMOPC
15p
13.5%
82
CPC '21 Contest 1 P5 - AQT and Modern Art
Uncategorized
15p
15.8%
45
QCC P2 - Online School
Uncategorized
5p
30.9%
83
An Animal Contest 2 P3 - Koala Balloons
AAC
12p
15.2%
180
ECOO '21 P1 - Many Messages
ECOO
3p
28.9%
451
ECOO '21 P2 - DNA Derren
ECOO
3p
58.7%
330
ECOO '21 P3 - Quintessential Questions
ECOO
3p
63.9%
225
ECOO '21 P4 - Chris' Candy
ECOO
7p
23.6%
109
ECOO '21 P5 - Waldwick's Walk
ECOO
17p
21.6%
23
ECOO '21 P6 - Problematic Pathways
ECOO
30p
9.2%
4
Baltic OI '13 P1 - Ball Machine
Baltic OI
15p
23.4%
14
BSSPC '21 S4 - Child Prodigy Chadstin
Uncategorized
17p
6.7%
25
BSSPC '21 J6 - Lakshy and Orz Trees
Uncategorized
12
15.7%
81
BSSPC '21 S3 - James's Egirl Discord Status
Uncategorized
7p
21.8%
155
Monkey Motel
Uncategorized
12p
21.5%
23
BSSPC '21 J3 - Magic Paint Gun Cartridges
Uncategorized
5
57.1%
148
DMOPC '20 Contest 6 P3 - Bread Merchant
DMOPC
10p
18.9%
116
An Animal Contest 3 P3 - Monkey Market
AAC
7
20.2%
400
BSSPC '21 J5 - James and the Euclid Test
Uncategorized
7p
25.4%
113
BSSPC '21 J4 - James's Magical Soups
Uncategorized
7p
14.1%
92
DMOPC '21 Contest 3 P5 - Crowded Travels
DMOPC
20p
20.8%
18
DMOPC '20 Contest 6 P6 - Dumping Buckets
DMOPC
25p
9.7%
18
BSSPC '21 J1 - Eggy's New Clothes
Uncategorized
3
40.1%
537
BSSPC '21 J2 - James and Youtube
Uncategorized
3
31.1%
186
DMOPC '20 Contest 6 P2 - Interpretive Art
DMOPC
7p
11.6%
118
DMOPC '20 Contest 7 P3 - Senpai and Art
DMOPC
20p
10.7%
28
DMOPC '20 Contest 7 P6 - Maou and Division
DMOPC
25p
11.2%
13
DMOPC '20 Contest 7 P2 - Alice and Tiles
DMOPC
10p
19.1%
57
Canada Day Contest 2021 - Half Heart
Seasonal
25
5.5%
8
DMOPC '20 Contest 7 P1 - Bob and Balance
DMOPC
7p
24.2%
182
Spring Coding Bowl '22 P2 - Chicken Strips
Uncategorized
5p
6.9%
34
DMOPC '20 Contest 7 P5 - Mayors and Tolls
DMOPC
20
40.3%
39
CPC '21 Contest 1 P7 - AQT and Quarantine
Uncategorized
20p
15.5%
15
DMOPC '21 Contest 1 P2 - Folding Clothes
DMOPC
7p
31.7%
187
An Animal Contest 3 P2 - Monkey Potato
AAC
5p
18.8%
556
«
1
2
...
34
35
36
37
38
39
...
99
100
»