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
...
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
COCI '08 Contest 3 #6 Najkraci
APIO '10 P1 - Commando
JOI '14 Open P1 - Factories
DWITE '10 R3 #3 - Dominos Tiling
CCC '19 S4 - Tourism
CCC '14 S1 - Party Invitation
IOI '14 Practice Task 1 - Square
Problem ▴
Category
Points
AC %
Users
CCC '17 J1 - Quadrant Selection
CCC
3
60.6%
5586
CCC '17 J2 - Shifty Sum
CCC
3
54.3%
4581
CCC '17 J3 - Exactly Electrical
CCC
3p
29.9%
2371
CCC '17 J4 - Favourite Times
CCC
5p
23.4%
1570
CCC '17 S1 - Sum Game
CCC
3
47.3%
3208
CCC '17 S2 - High Tide, Low Tide
CCC
5
27.8%
2843
CCC '17 S3 - Nailed It!
CCC
7p
30.5%
1720
CCC '17 S4 - Minimum Cost Flow
CCC
17p
14.1%
771
CCC '17 S5 - RMT
CCC
20p
19.2%
245
CCC '18 J1 - Telemarketer or not?
CCC
3
40.1%
6891
CCC '18 J2 - Occupy parking
CCC
3
53.4%
5666
CCC '18 J3 - Are we there yet?
CCC
3
55.5%
3111
CCC '18 J5 - Choose your own path
CCC
7p
24.1%
1613
CCC '18 S1 - Voronoi Villages
CCC
3p
33.5%
3571
CCC '18 S2 - Sunflowers
CCC
5p
39.4%
2808
CCC '18 S3 - RoboThieves
CCC
12p
14.1%
1135
CCC '18 S4 - Balanced Trees
CCC
15p
16.9%
576
CCC '18 S5 - Maximum Strategic Savings
CCC
20p
26.8%
407
CCC '19 J1 - Winning Score
CCC
3
50.8%
7016
CCC '19 J2 - Time to Decompress
CCC
3
52.4%
3328
CCC '19 J3 - Cold Compress
CCC
5
46.2%
3161
CCC '19 J5 - Rule of Three
CCC
20p
0.7%
7
CCC '19 S1 - Flipper
CCC
3p
46.1%
3955
CCC '19 S2 - Pretty Average Primes
CCC
5p
25.9%
2358
CCC '19 S3 - Arithmetic Square
CCC
12p
13.6%
501
CCC '19 S4 - Tourism
CCC
20p
7.7%
249
CCC '19 S5 - Triangle: The Data Structure
CCC
20p
17.9%
358
CCC '20 J1 - Dog Treats
CCC
3
56.1%
4018
CCC '20 J2 - Epidemiology
CCC
3
27.1%
3708
CCC '20 J3 - Art
CCC
3p
42.9%
2367
CCC '20 J4 - Cyclic Shifts
CCC
5p
45.7%
2291
CCC '20 J4 - Cyclic Shifts (Hard)
CCC
12p
3.8%
36
CCC '20 S1 - Surmising a Sprinter's Speed
CCC
5p
42.8%
2047
CCC '20 S2 - Escape Room
CCC
10p
12.8%
1695
CCC '20 S2 - Escape Room (Hard)
CCC
15p
5.6%
55
CCC '20 S3 - Searching for Strings
CCC
12p
8.9%
843
CCC '20 S4 - Swapping Seats
CCC
12p
25.6%
491
CCC '20 S5 - Josh's Double Bacon Deluxe
CCC
17p
29.6%
258
CCC '21 J1 - Boiling Water
CCC
3p
53.7%
3167
CCC '21 J2 - Silent Auction
CCC
3p
51.2%
2759
CCC '21 J3 - Secret Instructions
CCC
5p
36.1%
2535
CCC '21 J4 - Arranging Books
CCC
7p
19.6%
1324
CCC '21 S1 - Crazy Fencing
CCC
5p
47.7%
2559
CCC '21 S2 - Modern Art
CCC
7p
28.9%
2252
CCC '21 S3 - Lunch Concert
CCC
10p
24.6%
1018
CCC '21 S4 - Daily Commute
CCC
12p
26.0%
585
CCC '21 S5 - Math Homework
CCC
15p
24.5%
418
CCC '22 J1 - Cupcake Party
CCC
3
55.3%
2929
CCC '22 J2 - Fergusonball Ratings
CCC
3
47.5%
2682
CCC '22 J3 - Harp Tuning
CCC
5p
33.2%
1497
«
1
2
...
14
15
16
17
18
19
...
99
100
»