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
...
87
88
89
90
91
92
...
99
100
»
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 '19 S2 - Pretty Average Primes
IOI '94 P1 - The Triangle
CCC '24 S2 - Heavy-Light Composition
CCC '24 J3 - Bronze Count
DMOPC '20 Contest 4 P1 - Missing Numbers
SAC '22 Code Challenge 4 Junior P4 - Obligatory Permutation Problem
Problem
Category
Points ▾
AC %
Users
CCC '11 J1 - Which Alien?
CCC
3
35.6%
6373
CCC '05 J1 - The Cell Sell
CCC
3
8.0%
1451
CCC '05 J2 - RSA Numbers
CCC
3
40.8%
2976
CCC '06 J2 - Roll the Dice
CCC
3
27.1%
3035
CCC '06 J3 - Cell-Phone Messaging
CCC
3
41.3%
1464
CCC '06 J1 - Canadian Calorie Counting
CCC
3
27.4%
7202
CCC '11 S2 - Multiple Choice
CCC
3
55.1%
6271
CCC '04 J1 - Squares
CCC
3
32.5%
6125
CCC '04 J2 - Terms of Office
CCC
3
37.4%
3514
CCC '04 J3 - Smile with Similes
CCC
3
57.8%
3969
CCC '07 J1 - Who is in the Middle?
CCC
3
47.0%
9154
CCC '07 J2 - I Speak TXTMSG
CCC
3
21.8%
2280
CCC '07 J3 - Deal or No Deal Calculator
CCC
3
33.0%
3248
CCC '08 J1 - Body Mass Index
CCC
3
34.8%
5616
CCC '08 J2 - Do the Shuffle
CCC
3
43.2%
3416
CCC '08 J3 - GPS Text Entry
CCC
3
56.0%
1339
CCC '10 J1 - What is n, Daddy?
CCC
3
30.8%
4015
CCC '07 S1 - Federal Voting Age
CCC
3
36.2%
2325
DMOPC '14 Contest 1 P2 - Tiles
DMOPC
3p
54.2%
1271
DMOPC '14 Contest 1 P3 - New Students
DMOPC
3p
37.6%
874
CCC '12 S1 - Don't pass me the ball!
CCC
3
56.4%
2234
Halloween '14 P1 - Rabbit Girls
Seasonal
3p
21.3%
537
The Cosmic Era P1 - Ship
Uncategorized
3
29.1%
1110
DMOPC '14 Contest 2 P1 - Logging Log
DMOPC
3p
37.6%
780
GFSSOC '14 Winter J1 - Flying Plushies
GFSSOC
3p
50.6%
888
GFSSOC '14 Winter J2 - Wow much parking lot
GFSSOC
3p
52.6%
497
GFSSOC '14 Winter J3 - Waiting
GFSSOC
3p
51.8%
431
DMOPC '14 Contest 3 P1 - Not Enough Users!
DMOPC
3p
48.6%
858
CCC '03 J1 - Trident
CCC
3
28.6%
2323
CCC '03 J2 - Picture Perfect
CCC
3p
23.9%
1613
CCC '02 J1 - 0123456789
CCC
3
5.4%
722
CCC '02 J2 - AmeriCanadian
CCC
3
25.0%
3873
STNBD P1 - Ren Ashbell
Uncategorized
3p
29.3%
944
TSOC '15 Contest 1 #1 - Molecular or Non-Molecular?
TSOC
3p
37.9%
181
New Year's '15 P1 - Invitation Devastation
Seasonal
3
42.8%
355
VM7WC '15 #1 Bronze - Goon
VM7WC
3
38.4%
533
DMOPC '14 Exam Time P1 - French Homework
DMOPC
3
49.4%
471
VM7WC '15 #2 Bronze - Recruits!
VM7WC
3
28.0%
344
COCI '14 Contest 5 #1 Funghi
COCI
3p
49.4%
346
VM7WC '15 #4 Bronze - Melanie's Cradles
VM7WC
3
41.4%
135
DMOPC '14 Contest 4 P1 - New Key
DMOPC
3p
32.1%
209
DMOPC '14 Contest 4 P2 - Redirection
DMOPC
3p
44.3%
184
Mock CCC '15 J1 - 416
Mock CCC
3p
24.1%
761
Mock CCC '15 J3 - Problem-setting Pandemonium
Mock CCC
3p
59.7%
533
CSPC '15 #1 - The Card Game
CSPC
3
16.6%
163
CSPC '15 #2 - Build Season
CSPC
3
40.1%
155
VM7WC '15 #5 Bronze - Melanioana
VM7WC
3
29.3%
114
COCI '14 Contest 6 #1 Paprika
COCI
3p
54.8%
85
16 BIT S/W ONLY
Uncategorized
3
36.9%
2690
CCC '15 S1 - Zero That Out
CCC
3
51.0%
3875
«
1
2
...
87
88
89
90
91
92
...
99
100
»