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
...
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 '24 J4 - Troublesome Keys
CCC '24 S2 - Heavy-Light Composition
COCI '22 Contest 4 #1 7Krokods
CCC '24 J5 - Harvest Waterloo
CCC '19 J3 - Cold Compress
CCC '08 S4 - Twenty-four
CCC '24 S3 - Swipe
Problem
Category
Points
AC %
Users ▾
Hello, World!
Uncategorized
3
56.2%
12092
CCC '13 J1 - Next in line
CCC
3
62.3%
11892
CCC '07 J1 - Who is in the Middle?
CCC
3
47.0%
9047
CCC '15 J1 - Special Day
CCC
3
36.9%
8238
A Plus B
Uncategorized
3p
48.7%
7961
CCC '14 J1 - Triangle Times
CCC
3
32.9%
7410
CCC '06 J1 - Canadian Calorie Counting
CCC
3
27.5%
7102
CCC '15 J2 - Happy or Sad
CCC
3
37.1%
6950
CCC '19 J1 - Winning Score
CCC
3
50.9%
6909
CCC '18 J1 - Telemarketer or not?
CCC
3
40.1%
6765
CCC '11 J1 - Which Alien?
CCC
3
35.7%
6339
CCC '11 S2 - Multiple Choice
CCC
3
55.2%
6175
CCC '04 J1 - Squares
CCC
3
32.5%
6082
CCC '12 J1 - Speed fines are not fine!
CCC
3
30.7%
5742
CCC '11 S1 - English or French?
CCC
5
35.5%
5673
CCC '08 J1 - Body Mass Index
CCC
3
34.8%
5589
CCC '18 J2 - Occupy parking
CCC
3
53.3%
5584
CCC '17 J1 - Quadrant Selection
CCC
3
60.5%
5548
DMOPC '15 Contest 7 P2 - Not a Wall of Text
DMOPC
3p
50.1%
5503
CCC '14 J2 - Vote Count
CCC
3
44.5%
5309
DMOPC '14 Contest 5 P1 - Core Drill
DMOPC
3p
58.5%
4891
CCC '13 J2 - Rotating letters
CCC
3
44.9%
4786
CCC '16 J1 - Tournament Selection
CCC
3
41.2%
4677
CCC '12 J2 - Sounds fishy!
CCC
3
33.8%
4543
CCC '17 J2 - Shifty Sum
CCC
3
54.2%
4530
WC '16 Contest 1 J1 - A Spooky Season
Woburn Challenge
3
47.5%
4519
CCC '14 J3 - Double Dice
CCC
3
56.4%
4453
CCC '00 S1 - Slot Machines
CCC
5
27.3%
4442
WC '15 Contest 2 J1 - A New Hope
Woburn Challenge
3
40.1%
4070
CCC '10 J1 - What is n, Daddy?
CCC
3
30.9%
3995
CCC '20 J1 - Dog Treats
CCC
3
56.1%
3971
CCC '04 J3 - Smile with Similes
CCC
3
57.9%
3937
CCC '19 S1 - Flipper
CCC
3p
46.0%
3931
CCC '13 S1 - From 1987 to 2013
CCC
5
45.8%
3883
CCC '15 S1 - Zero That Out
CCC
3
51.0%
3861
CCC '02 J2 - AmeriCanadian
CCC
3
25.0%
3837
Sorting
Classics
3
47.3%
3806
WC '17 Contest 1 J2 - How's the Weather?
Woburn Challenge
3
68.5%
3670
CCC '09 J1 - ISBN
CCC
3
47.4%
3660
CCC '20 J2 - Epidemiology
CCC
3
27.0%
3651
CCC '18 S1 - Voronoi Villages
CCC
3p
33.4%
3517
CCC '14 S1 - Party Invitation
CCC
5
47.1%
3509
CCC '04 J2 - Terms of Office
CCC
3
37.4%
3503
CCC '16 S2 - Tandem Bicycle
CCC
5p
53.7%
3482
CCC '08 J2 - Do the Shuffle
CCC
3
43.1%
3385
CCC '19 J2 - Time to Decompress
CCC
3
52.5%
3281
List Minimum
Uncategorized
3
49.7%
3262
CCC '16 J2 - Magic Squares
CCC
3
34.7%
3214
CCC '07 J3 - Deal or No Deal Calculator
CCC
3
32.8%
3188
CCC '17 S1 - Sum Game
CCC
3
47.4%
3180
«
1
2
3
4
5
6
...
99
100
»