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 '14 Contest 5 #3 Traktor
Knapsack 4
IOI '04 P4 - Phidias
WC '17 Contest 3 J3 - Uncrackable
CCCHK '15 J3 - Queens can't attack me!
IOI '07 P4 - Miners
IOI '94 P1 - The Triangle
Problem
Category
Points
AC %
Users
CCC '00 J1 - Calendar
CCC
5
11.1%
1347
CCC '00 J2 - 9966
CCC
3
35.8%
1945
CCC '00 S1 - Slot Machines
CCC
5
27.3%
4464
CCC '00 S2 - Babbling Brooks
CCC
7
34.1%
2521
CCC '00 S3 - Surfing
CCC
7
17.5%
619
CCC '00 S4 - Golf
CCC
7
24.4%
2291
CCC '00 S5 - Sheep and Coyotes
CCC
10p
4.0%
167
CCC '00 S5 - Sheep and Coyotes (Hard)
CCC
20
4.1%
18
CCC '01 J1 - Dressing Up
CCC
3
48.2%
2864
CCC '01 J2 - Mod Inverse
CCC
3
42.9%
2518
CCC '01 S1 - Keeping Score
CCC
5
32.7%
1500
CCC '01 S2 - Spirals
CCC
5
41.2%
908
CCC '01 S2 - Spirals (Exact Version)
CCC
7
8.2%
104
CCC '01 S3 - Strategic Bombing
CCC
7
38.7%
1452
CCC '01 S4 - Cookies
CCC
10
19.2%
411
CCC '01 S5 - Post's Correspondence Problem
CCC
10
28.9%
315
CCC '02 J1 - 0123456789
CCC
3
5.3%
718
CCC '02 J2 - AmeriCanadian
CCC
3
25.1%
3861
CCC '02 S1 - The Students' Council Breakfast
CCC
5
39.5%
1495
CCC '02 S2 - Fraction Action
CCC
5
18.9%
1874
CCC '02 S3 - Blindfold
CCC
15
6.1%
150
CCC '02 S4 - Bridge Crossing
CCC
10p
37.1%
882
CCC '02 S4 - Bridge Crossing (Hard)
CCC
20
8.6%
32
CCC '02 S5 - Follow the Bouncing Ball
CCC
10
13.8%
190
CCC '03 J1 - Trident
CCC
3
28.6%
2317
CCC '03 J2 - Picture Perfect
CCC
3p
23.9%
1612
CCC '03 S1 - Snakes and Ladders
CCC
5
20.5%
3102
CCC '03 S2 - Poetry
CCC
5
17.3%
1451
CCC '03 S3 - Floor Plan
CCC
7
27.8%
1946
CCC '03 S4 - Substrings
CCC
15p
7.8%
370
CCC '03 S5 - Trucking Troubles
CCC
10p
17.5%
680
CCC '04 J1 - Squares
CCC
3
32.5%
6113
CCC '04 J2 - Terms of Office
CCC
3
37.4%
3509
CCC '04 J3 - Smile with Similes
CCC
3
57.8%
3959
CCC '04 J4 - Simple Encryption
CCC
5
51.1%
1707
CCC '04 J5 - Fractals
CCC
10
35.5%
219
CCC '04 S1 - Fix
CCC
5
32.6%
1196
CCC '04 S2 - TopYodeller
CCC
5
21.5%
721
CCC '04 S3 - Spreadsheet
CCC
10
27.1%
613
CCC '04 S4 - Space Turtle
CCC
10p
19.7%
171
CCC '04 S5 - Super Plumber
CCC
10p
23.8%
401
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1445
CCC '05 J2 - RSA Numbers
CCC
3
40.8%
2970
CCC '05 J3 - Returning Home
CCC
5
37.3%
2353
CCC '05 J4 - Cross Spiral
CCC
7p
32.7%
577
CCC '05 J5 - Bananas
CCC
10
21.7%
1466
CCC '05 S1 - Snow Calls
CCC
5
43.3%
2269
CCC '05 S2 - Mouse Move
CCC
5
37.2%
1683
CCC '05 S3 - Quantum Operations
CCC
10p
34.8%
438
CCC '05 S4 - Pyramid Message Scheme
CCC
10
35.7%
816
«
1
2
3
4
5
6
»