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
3
4
5
6
»
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
COCI '08 Contest 3 #2 Kemija
DWITE '10 R3 #3 - Dominos Tiling
CCC '24 J3 - Bronze Count
Problem
Category
Points
AC %
▾
Users
CCC '14 S4 - Tinted Glass Window
CCC
15p
29.2%
673
CCC '07 S1 - Federal Voting Age
CCC
3
36.2%
2329
CCC '14 S5 - Lazy Fox
CCC
20p
17.9%
456
CCC '13 S2 - Bridge Transport
CCC
5
26.7%
2058
CCC '13 S5 - Factor Solitaire
CCC
15p
42.8%
735
CCC '12 S1 - Don't pass me the ball!
CCC
3
56.4%
2240
CCC '12 S2 - Aromatic Numbers
CCC
5
53.4%
1717
CCC '12 S3 - Absolutely Acidic
CCC
7
26.6%
1861
CCC '12 S4 - A Coin Game
CCC
15
27.1%
458
CCC '12 S5 - Mouse Journey
CCC
7
45.6%
1818
CCC '11 J5 - Unfriend
CCC
7
46.8%
1003
CCC '11 S3 - Alice Through the Looking Glass
CCC
10p
36.0%
1196
CCC '11 S5 - Switch
CCC
12p
18.3%
415
CCC '10 S1 - Computer Purchase
CCC
5
14.1%
1326
CCC '10 S2 - Huffman Encoding
CCC
5
53.6%
1576
CCC '10 S3 - Firehose
CCC
15p
18.6%
651
CCC '10 S4 - Animal Farm
CCC
15p
25.6%
529
CCC '10 S5 - Nutrient Tree
CCC
20p
19.7%
269
CCC '03 J1 - Trident
CCC
3
28.6%
2325
CCC '03 J2 - Picture Perfect
CCC
3p
23.9%
1614
CCC '03 S1 - Snakes and Ladders
CCC
5
20.5%
3107
CCC '03 S2 - Poetry
CCC
5
17.3%
1456
CCC '03 S3 - Floor Plan
CCC
7
27.8%
1954
CCC '03 S5 - Trucking Troubles
CCC
10p
17.5%
683
CCC '02 J1 - 0123456789
CCC
3
5.4%
724
CCC '02 J2 - AmeriCanadian
CCC
3
25.0%
3883
CCC '02 S1 - The Students' Council Breakfast
CCC
5
39.6%
1498
CCC '02 S2 - Fraction Action
CCC
5
19.0%
1884
CCC '07 S2 - Boxes
CCC
5
27.5%
1214
CCC '07 S3 - Friends
CCC
7
37.5%
1703
CCC '07 S4 - Waterpark
CCC
7
30.9%
1502
CCC '01 J1 - Dressing Up
CCC
3
48.2%
2874
CCC '01 J2 - Mod Inverse
CCC
3
42.9%
2537
CCOQR '16 - Stupendous Bowties
CCC
10p
31.8%
248
CCOQR '16 - Through A Maze Darkly
CCC
20p
18.4%
104
CCOQR '16 - Data Structure
CCC
15p
22.1%
177
CCCHK '15 J1 - Rock-paper-scissors
CCC
3
51.7%
854
CCCHK '15 J2 - What is the minimum area?
CCC
5
35.7%
267
CCCHK '15 J3 - Queens can't attack me!
CCC
5
51.1%
613
CCCHK '15 J4 - Where to build my house?
CCC
5
18.0%
270
CCCHK '15 J5 - No friends in the same group.
CCC
15p
9.8%
33
CCC '05 S3 - Quantum Operations
CCC
10p
34.8%
439
CCC '05 S4 - Pyramid Message Scheme
CCC
10
35.7%
819
CCC '01 S4 - Cookies
CCC
10
19.2%
418
CCC '05 J4 - Cross Spiral
CCC
7p
32.6%
581
CCC '01 S5 - Post's Correspondence Problem
CCC
10
28.9%
315
CCC '96 S2 - Divisibility by 11
CCC
7
6.8%
179
CCC '96 S5 - Maximum Distance
CCC
7
25.4%
417
CCC '96 S3 - Pattern Generator
CCC
5
11.0%
355
CCC '98 S2 - Cross Number Puzzle
CCC
5
43.1%
495
«
1
2
3
4
5
6
»