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
...
14
15
16
17
18
19
...
100
101
»
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 '21 S2 - Modern Art
Baltic OI '17 P5 - Plus Minus
Big Deposits
IOI '11 P4 - Crocodile's Underground City
COCI '08 Contest 3 #1 Pet
COCI '08 Contest 3 #2 Kemija
Arcadia Computing Contest 1 P3 - ScanTron
Problem
Category
Points
AC %
Users
CCC '20 S2 - Escape Room (Hard)
CCC
15p
5.3%
57
CCC '20 S3 - Searching for Strings
CCC
12p
9.3%
973
CCC '20 S4 - Swapping Seats
CCC
12p
25.2%
528
CCC '20 S5 - Josh's Double Bacon Deluxe
CCC
17p
29.7%
266
CCC '21 J1 - Boiling Water
CCC
3p
53.3%
3399
CCC '21 J2 - Silent Auction
CCC
3p
50.1%
2963
CCC '21 J3 - Secret Instructions
CCC
5p
35.9%
2714
CCC '21 J4 - Arranging Books
CCC
7p
19.9%
1437
CCC '21 S1 - Crazy Fencing
CCC
5p
47.7%
2696
CCC '21 S2 - Modern Art
CCC
7p
29.0%
2410
CCC '21 S3 - Lunch Concert
CCC
10p
25.0%
1080
CCC '21 S4 - Daily Commute
CCC
12p
26.0%
618
CCC '21 S5 - Math Homework
CCC
15p
25.3%
452
CCC '22 J1 - Cupcake Party
CCC
3
55.6%
3242
CCC '22 J2 - Fergusonball Ratings
CCC
3
47.3%
2909
CCC '22 J3 - Harp Tuning
CCC
5p
33.2%
1635
CCC '22 J5 - Square Pool
CCC
10p
20.6%
521
CCC '22 S1 - Good Fours and Good Fives
CCC
5p
39.4%
2248
CCC '22 S2 - Good Groups
CCC
5p
26.2%
1673
CCC '22 S3 - Good Samples
CCC
10p
18.2%
706
CCC '22 S4 - Good Triplets
CCC
15p
28.2%
340
CCC '22 S5 - Good Influencers
CCC
17p
32.2%
208
CCC '23 J1 - Deliv-e-droid
CCC
3p
55.6%
2069
CCC '23 J2 - Chili Peppers
CCC
3p
52.4%
1929
CCC '23 J3 - Special Event
CCC
5p
37.7%
1504
CCC '23 J5 - CCC Word Hunt
CCC
10p
24.9%
598
CCC '23 S1 - Trianglane
CCC
5p
31.8%
1901
CCC '23 S2 - Symmetric Mountains
CCC
7p
26.7%
907
CCC '23 S3 - Palindromic Poster
CCC
10p
15.4%
464
CCC '23 S4 - Minimum Cost Roads
CCC
15p
19.4%
287
CCC '23 S5 - The Filter
CCC
20p
15.9%
98
CCC '24 J1 - Conveyor Belt Sushi
CCC
3p
67.9%
1223
CCC '24 J2 - Dusa And The Yobis
CCC
3p
56.4%
937
CCC '24 J3 - Bronze Count
CCC
5p
39.1%
831
CCC '24 J4 - Troublesome Keys
CCC
5p
18.4%
456
CCC '24 J5 - Harvest Waterloo
CCC
7p
35.7%
512
CCC '24 S1 - Hat Circle
CCC
3p
64.0%
809
CCC '24 S2 - Heavy-Light Composition
CCC
5p
51.8%
720
CCC '24 S3 - Swipe
CCC
10p
16.1%
278
CCC '24 S4 - Painting Roads
CCC
12p
34.6%
228
CCC '24 S5 - Chocolate Bar Partition
CCC
20p
9.9%
33
CCC '96 S1 - Deficient, Perfect, and Abundant
CCC
5
32.4%
1963
CCC '96 S2 - Divisibility by 11
CCC
7
6.8%
199
CCC '96 S3 - Pattern Generator
CCC
5
11.4%
387
CCC '96 S4 - When in Rome
CCC
10
33.1%
585
CCC '96 S5 - Maximum Distance
CCC
7
25.4%
436
CCC '97 S1 - Sentences
CCC
5
29.7%
1064
CCC '97 S2 - Nasty Numbers
CCC
5
46.4%
823
CCC '97 S3 - Double Knockout Competition
CCC
5
11.1%
187
CCC '97 S4 - Dynamic Dictionary Coding
CCC
5
12.1%
242
«
1
2
...
14
15
16
17
18
19
...
100
101
»