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
7
8
9
»
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 '24 J4 - Troublesome Keys
CCC '24 J5 - Harvest Waterloo
CCC '00 S2 - Babbling Brooks
CCC '19 J3 - Cold Compress
CCC '23 S4 - Minimum Cost Roads
CCC '05 J4 - Cross Spiral
BlueBook - Sieve
Problem
Category
Points
AC %
Users
CCC '21 S5 - Math Homework
CCC
15p
25.1%
459
CCC '22 J1 - Cupcake Party
CCC
3
55.5%
3321
CCC '22 J2 - Fergusonball Ratings
CCC
3
47.0%
2995
CCC '22 J3 - Harp Tuning
CCC
5p
33.3%
1694
CCC '22 J5 - Square Pool
CCC
10p
20.1%
530
CCC '22 S1 - Good Fours and Good Fives
CCC
5p
39.4%
2278
CCC '22 S2 - Good Groups
CCC
5p
26.3%
1698
CCC '22 S3 - Good Samples
CCC
10p
18.2%
720
CCC '22 S4 - Good Triplets
CCC
15p
27.7%
344
CCC '22 S5 - Good Influencers
CCC
17p
32.2%
211
CCC '23 J1 - Deliv-e-droid
CCC
3p
55.4%
2141
CCC '23 J2 - Chili Peppers
CCC
3p
52.0%
2007
CCC '23 J3 - Special Event
CCC
5p
38.1%
1580
CCC '23 J5 - CCC Word Hunt
CCC
10p
24.4%
617
CCC '23 S1 - Trianglane
CCC
5p
31.6%
1940
CCC '23 S2 - Symmetric Mountains
CCC
7p
26.5%
923
CCC '23 S3 - Palindromic Poster
CCC
10p
15.5%
476
CCC '23 S4 - Minimum Cost Roads
CCC
15p
19.6%
297
CCC '23 S5 - The Filter
CCC
20p
15.8%
103
CCC '24 J1 - Conveyor Belt Sushi
CCC
3p
67.7%
1322
CCC '24 J2 - Dusa And The Yobis
CCC
3p
56.3%
1024
CCC '24 J3 - Bronze Count
CCC
5p
38.4%
915
CCC '24 J4 - Troublesome Keys
CCC
5p
18.3%
491
CCC '24 J5 - Harvest Waterloo
CCC
7p
36.0%
565
CCC '24 S1 - Hat Circle
CCC
3p
63.7%
863
CCC '24 S2 - Heavy-Light Composition
CCC
5p
50.9%
772
CCC '24 S3 - Swipe
CCC
10p
16.1%
289
CCC '24 S4 - Painting Roads
CCC
12p
33.6%
242
CCC '24 S5 - Chocolate Bar Partition
CCC
20p
9.6%
35
CCC '96 S1 - Deficient, Perfect, and Abundant
CCC
5
32.4%
1974
CCC '96 S2 - Divisibility by 11
CCC
7
6.8%
201
CCC '96 S3 - Pattern Generator
CCC
5
11.6%
394
CCC '96 S4 - When in Rome
CCC
10
33.0%
592
CCC '96 S5 - Maximum Distance
CCC
7
25.4%
439
CCC '97 S1 - Sentences
CCC
5
29.7%
1066
CCC '97 S2 - Nasty Numbers
CCC
5
46.4%
826
CCC '97 S3 - Double Knockout Competition
CCC
5
11.1%
187
CCC '97 S4 - Dynamic Dictionary Coding
CCC
5
12.1%
242
CCC '97 S5 - Long Division
CCC
10
10.6%
75
CCC '98 S1 - Censor
CCC
5
37.5%
1557
CCC '98 S2 - Cross Number Puzzle
CCC
5
43.2%
515
CCC '98 S3 - Mars Rover
CCC
7p
16.5%
176
CCC '98 S4 - Lottery
CCC
10
9.9%
99
CCC '98 S5 - Mountain Passage
CCC
10
13.2%
162
CCC '99 S1 - Card Game
CCC
5
31.1%
1100
CCC '99 S2 - Year 2000
CCC
7
14.3%
113
CCC '99 S3 - Divided Fractals
CCC
7
17.0%
80
CCC '99 S4 - A Knightly Pursuit
CCC
12
18.5%
369
CCC '99 S5 - Letter Arithmetic
CCC
12
16.8%
81
CCCJQR P1
Seasonal
0
71.9%
669
«
1
2
3
4
5
6
7
8
9
»