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
...
16
17
18
19
20
21
...
104
105
»
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
CIW
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 '21 Contest 5 #4 Radio
Longest Increasing Subsequence
Amplitude Hackathon '23 Practice Problem 2 - Go Amplitude!
Amplitude Hackathon Summer '24 Problem 4 - Spenser's Big Announcement
Valentine's Day '19 S3 - Mathematical English
Problem
Category
Points
AC %
Users
CCC '26 S3 - Common Card Choice
CCC
7p
16.7%
147
CCC '26 S4 - Minecarts
CCC
15p
16.8%
68
CCC '26 S5 - On the Fence
CCC
30p
6.6%
12
CCC '96 S1 - Deficient, Perfect, and Abundant
CCC
5p
32.8%
2115
CCC '96 S2 - Divisibility by 11
CCC
7p
7.4%
240
CCC '96 S3 - Pattern Generator
CCC
5p
12.6%
459
CCC '96 S4 - When in Rome
CCC
10p
33.7%
626
CCC '96 S5 - Maximum Distance
CCC
7p
22.9%
398
CCC '97 S1 - Sentences
CCC
5p
29.9%
1134
CCC '97 S2 - Nasty Numbers
CCC
5p
46.9%
882
CCC '97 S3 - Double Knockout Competition
CCC
5p
11.7%
202
CCC '97 S4 - Dynamic Dictionary Coding
CCC
5p
12.6%
267
CCC '97 S5 - Long Division
CCC
10p
11.2%
82
CCC '98 S1 - Censor
CCC
5p
38.4%
1692
CCC '98 S2 - Cross Number Puzzle
CCC
5p
43.5%
561
CCC '98 S3 - Mars Rover
CCC
7p
16.6%
188
CCC '98 S4 - Lottery
CCC
10p
10.6%
109
CCC '98 S5 - Mountain Passage
CCC
10p
13.8%
180
CCC '99 S1 - Card Game
CCC
5p
31.0%
1265
CCC '99 S2 - Year 2000
CCC
7p
14.3%
125
CCC '99 S3 - Divided Fractals
CCC
7p
18.4%
98
CCC '99 S4 - A Knightly Pursuit
CCC
12p
18.7%
414
CCC '99 S5 - Letter Arithmetic
CCC
12p
16.6%
89
CCCJQR P1
Seasonal
0
70.1%
721
CCCJQR P2
Seasonal
3
20.5%
160
CCCJQR P3
Seasonal
7
8.9%
181
CCCJQR P4
Seasonal
0
25.2%
32
CCCJQR P5
Seasonal
15p
22.7%
27
Coin Change
Uncategorized
7
41.5%
830
CCO '00 P1 - Subsets
CCO
10p
34.4%
294
CCO '00 P2 - Ransom Note
CCO
12p
9.9%
9
CCO '00 P3 - The Game Of 31
CCO
10p
46.5%
27
CCO '00 P4 - Packet Routing
CCO
7p
56.8%
74
CCO '00 P5 - Millikan's Oil Droplet Experiment
CCO
7p
17.1%
59
CCO '00 P6 - Extension Cords
CCO
12p
14.9%
10
CCO '01 P1 - The Monkey Dance
CCO
10p
45.1%
322
CCO '01 P2 - Coke or Chocolate Milk
CCO
12p
14.9%
17
CCO '01 P3 - Partitions
CCO
12p
36.7%
77
CCO '01 P4 - Breaking Level (Standard I/O)
CCO
12p
8.3%
52
CCO '01 P5 - Fast Food
CCO
7p
10.3%
31
CCO '01 P6 - Election Night
CCO
15p
15.3%
48
CCO '02 P1 - Spam
CCO
12p
38.1%
24
CCO '02 P2 - Game Show Math
CCO
12p
22.6%
50
CCO '02 P3 - Return To Blind Man's Bluff
CCO
12p
12.7%
17
CCO '02 P4 - Duathlon
CCO
10p
11.3%
41
CCO '02 P5 - Connect The Campus
CCO
12p
30.9%
121
CCO '02 P6 - Pit Stop Strategy
CCO
12p
43.1%
11
CCO '03 P1 - BFed
CCO
10p
24.3%
64
CCO '03 P2 - Concentration Cards
CCO
15p
34.3%
33
CCO '03 P3 - Cube
CCO
20p
12.4%
17
«
1
2
...
16
17
18
19
20
21
...
104
105
»