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
CCC '08 J4 - From Prefix to Postfix
Problem
Category
Points
AC %
Users
Mock CCC '24 Contest 1 J5 - Mathland
Mock CCC
10p
8.0%
34
Mock CCC '24 Contest 1 J4/S1 - Magical Magnetic Marbles
Mock CCC
5p
11.4%
267
Mock CCC '24 Contest 1 S2 - Owen the Toucan
Mock CCC
7p
32.8%
200
Mock CCC '24 Contest 1 S3 - Optimal Split Point
Mock CCC
10p
2.8%
26
Mock CCC '24 Contest 1 S4 - Tommy's Lemonade Stand
Mock CCC
12p
22.0%
29
Mock CCC '24 Contest 1 S5 - Mock CCC 2025
Mock CCC
20p
15.1%
21
Mock CCC '14 J1 - Love Overdose
Mock CCC
3
22.4%
518
Mock CCC '14 J2 - Rope Unfolding
Mock CCC
3
44.0%
296
Mock CCC '14 J3 - Clock Hands
Mock CCC
5
17.0%
109
Mock CCC '14 J4 - Selecting Shifts
Mock CCC
7p
11.2%
56
Mock CCC '14 J5 - Spacetime Surfer
Mock CCC
10
30.5%
87
Mock CCC '14 S1 - Reverse Find
Mock CCC
5
27.8%
240
Mock CCC '14 S2 - Sleep Cycle
Mock CCC
7p
16.0%
107
Mock CCC '14 S3 - Spreadsheet Sorting
Mock CCC
7
49.1%
437
Mock CCC '14 S4 - Roadtrip Tracking
Mock CCC
15p
9.0%
58
Mock CCC '14 S5 - Elimination Game
Mock CCC
15p
21.9%
59
Mock CCC '15 J1 - 416
Mock CCC
3p
24.4%
786
Mock CCC '15 J2 - Lowest Exam Mark
Mock CCC
5p
11.6%
430
Mock CCC '15 J3 - Problem-setting Pandemonium
Mock CCC
3p
59.7%
558
Mock CCC '15 J4 - Vox in Box
Mock CCC
7p
18.5%
83
Mock CCC '15 J5 - Royal Guard
Mock CCC
10p
16.6%
162
Mock CCC '15 S1 - Dupvoting
Mock CCC
5p
19.3%
167
Mock CCC '15 S2 - Problem-setting Pandemonium
Mock CCC
5p
36.2%
277
Mock CCC '15 S3 - The Tachyon Trap
Mock CCC
12p
18.7%
66
Mock CCC '15 S4 - Ice Pillars
Mock CCC
15p
28.9%
107
Mock CCC '15 S5 - Kongou
Mock CCC
40p
3.9%
13
Mock CCC '22 2 S1 - Kaguya Wants to Let Ishigami Pass
Mock CCC
5p
25.6%
182
Mock CCC '22 2 S2 - Kaguya Wants to Grow the Student Council
Mock CCC
10p
35.8%
110
Mock CCC '22 2 S3 - Kaguya Wants to Analyze the Academy Anthem
Mock CCC
12p
7.8%
41
Mock CCC '22 2 S4 - Kaguya Wants to Build a Great Wall
Mock CCC
15p
7.5%
8
Mock CCC '22 2 S5 - Kaguya Wants to go Window Shopping with Kei Shirogane
Mock CCC
30p
5.5%
5
Mock CCC '23 1 S1 - Composite Fibonacci Numbers
Mock CCC
5p
13.0%
150
Mock CCC '23 1 S2 - Keenan Hates Triangles
Mock CCC
5p
22.1%
98
Mock CCC '23 1 S3 - Richard The Penguin
Mock CCC
10p
5.9%
27
Mock CCC '23 1 S4 - Roger Says Yabe
Mock CCC
15p
7.2%
20
Mock CCC '23 1 S5 - The Obligatory Data Structures Problem
Mock CCC
25p
14.0%
10
Mock CCC '23 2 S1 - Composite Fibonacci Numbers
Mock CCC
3p
23.3%
285
Mock CCC '23 2 S2 - Keenan Hates Triangles
Mock CCC
7p
2.2%
38
Mock CCC '23 2 S3 - Richard The Penguin
Mock CCC
10p
4.1%
14
Mock CCC '23 2 S4 - Roger Says Yabe
Mock CCC
15p
19.0%
7
Mock CCC '23 2 S5 - The Obligatory Data Structures Problem
Mock CCC
25p
11.5%
4
Mock CCC '18 Contest 1 J1 - A String Problem
Mock CCC
3p
45.5%
519
Mock CCC '18 Contest 1 J2 - A Substring Problem
Mock CCC
3p
27.4%
350
Mock CCC '18 Contest 1 J3/S1 - A Math Problem
Mock CCC
5p
24.1%
377
Mock CCC '18 Contest 1 J4/S2 - A Square Problem
Mock CCC
5
34.5%
459
Mock CCC '18 Contest 1 J5/S3 - A Simulation Problem
Mock CCC
7p
21.6%
123
Mock CCC '18 Contest 1 S4 - A Graph Problem
Mock CCC
12p
20.2%
103
Mock CCC '18 Contest 1 S5 - A Palindrome Problem
Mock CCC
15p
8.3%
18
Mock CCC '18 Contest 2 J1 - An Arithmetic Problem
Mock CCC
3p
49.0%
455
Mock CCC '18 Contest 2 J2 - A Software Engineering Task
Mock CCC
3p
36.6%
172
«
1
2
3
4
5
6
7
8
9
»