Home
Problems
>
Submissions
Users
Contests
>
Submissions
Learning
More
>
About
Contact
Status
Capture the Flag
Lessons
FAQ
Achievements
Site Archive
Log in
or
Sign up
This site works best with JavaScript enabled.
Problems
«
1
2
3
4
5
6
7
8
9
...
18
19
»
Problem search
Full text search
Has editorial
Show problem types
Category
All
---
CCC
CCO
Classics
Co-Ed
Competitive
ECOO
Girls Invitational
ICS3U
JDCC
LCC
Uncategorized
Point range
Go
Random
Problem
Category
Points ▾
AC %
Users
JDCC '15 Contest 1 P4 - Basically Right
JDCC
7
7.4%
7
JDCC '15 Contest 3 P3 - CCC
JDCC
7
41.0%
13
JDCC '15 Contest 4 P2 - Ants on a Log
JDCC
7
87.5%
10
JDCC '15 Contest 4 P3 - Sorting Trains
JDCC
7
33.3%
5
JDCC '15 Contest 4 P4 - Roadwork
JDCC
7
21.4%
9
LCC '18 Contest 1 S3 - Abelian
LCC
7p
9.1%
15
LCC '18 Contest 2 J5 - Tall People 2
LCC
7p
15.9%
19
LCC '18 Contest 2 J4 - "Hard" Quadratics
LCC
7
13.2%
7
LCC '18 Contest 2 J3 - Wrong Dere(c)k!
LCC
7
5.4%
15
LCC '18 Contest 2 S3 - Earth Rumble
LCC
7p
18.3%
4
A Path Problem
Uncategorized
7
27.0%
13
Dim Sum 5 - Not Sure I'm Glad To Be Alive
Uncategorized
7p
1.4%
22
A Tree Problem
Uncategorized
7
18.1%
15
A Maximization Problem
Uncategorized
7p
29.1%
44
An Array Problem
Uncategorized
7
49.2%
46
LCC/Moose '18 Contest 3 S2 - Delivering Presents
LCC
7p
23.9%
44
Girls Invitational '18 S3 - Unknown Words
Girls Invitational
7
24.5%
11
Graph Theory 3
Uncategorized
7
9.2%
16
An AQT Problem
Uncategorized
7
55.6%
21
LCC '18 Contest 4 J5 - Making Palindromes
LCC
7p
9.7%
10
LCC '18 Contest 4 S3 - Flight Plan
LCC
7
43.4%
22
Inaho IV
Uncategorized
7p
45.8%
14
Inaho X
Uncategorized
7
77.8%
4
Mock CCC '19 Contest 1 S2 - Strings
Uncategorized
7p
28.4%
21
Mock CCC '19 Contest 1 J5 - One-way Hopscotch
Uncategorized
7p
27.3%
16
Searching For Bread
Co-Ed
7
41.3%
30
LCC '18 Contest 5 J4 - How Many 5s?
LCC
7p
11.5%
10
A Simple Mode
Uncategorized
7p
66.7%
2
LCC '18 Contest 5 S2 - Penny Pinching
LCC
7p
9.6%
7
Girls Invitational '18 J5 - Kstar and Party
Girls Invitational
7
26.0%
18
Girls Invitational '19 S3 - GOTO
Girls Invitational
7p
11.4%
7
Girls Invitational '19 J5 - Divisiblity
Girls Invitational
7p
18.3%
9
Graph Theory 5
Uncategorized
7
43.8%
6
A Harder Contest '19 - Flipper 2
Uncategorized
7p
13.3%
38
Triples
Uncategorized
7
7.9%
7
A Stack Problem
Uncategorized
7
16.7%
7
LCC/Moose '19 Contest 1 J5 - Om and uwu
LCC
7p
19.5%
9
A Newton Problem
Classics
7
32.2%
22
LCC/Moose '19 Contest 1 S2 - Siege
LCC
7p
45.9%
68
Favourite Numbers
Competitive
7p
27.0%
25
MLE '19 Contest 2 P1 - FUN
Uncategorized
7p
30.8%
14
1-Pile Nim
Competitive
7p
48.2%
37
LCC/Moose '19 Contest 3 J4 - Hash
LCC
7p
27.6%
6
LCC/Moose '19 Contest 3 J5 - Pesky Pascallions
LCC
7p
13.7%
8
Graph Theory 6
Competitive
7
37.3%
8
Maintaining an Array
ICS3U
7p
10.4%
17
LCC/Moose '19 Contest 3 S3 - Presents
LCC
7p
15.4%
25
Array Distances
Competitive
7p
12.7%
13
MLE '19 Contest 4 P9 - Poggers
Uncategorized
7
10.9%
10
MLE '19 Contest 4 P8 - IOI Game
Uncategorized
7
43.9%
16
«
1
2
3
4
5
6
7
8
9
...
18
19
»