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
...
83
84
85
86
87
88
...
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
WC '01 P3 - Back to the Future
DWITE '10 R3 #3 - Dominos Tiling
GFSSOC '15 Winter S1 - OR-deal
APIO '10 P1 - Commando
DMOPC '17 Contest 4 P1 - Ribbon Colouring Fun
Counting Subsequences
Cheerio Contest 1 S4 - Mystery Boxes
Problem ▾
Category
Points
AC %
Users
CCC '21 S3 - Lunch Concert
CCC
10p
24.6%
1019
CCC '21 S2 - Modern Art
CCC
7p
29.0%
2254
CCC '21 S1 - Crazy Fencing
CCC
5p
47.7%
2560
CCC '21 J4 - Arranging Books
CCC
7p
19.6%
1324
CCC '21 J3 - Secret Instructions
CCC
5p
36.1%
2538
CCC '21 J2 - Silent Auction
CCC
3p
51.2%
2759
CCC '21 J1 - Boiling Water
CCC
3p
53.7%
3171
CCC '20 S5 - Josh's Double Bacon Deluxe
CCC
17p
29.6%
258
CCC '20 S4 - Swapping Seats
CCC
12p
25.6%
491
CCC '20 S3 - Searching for Strings
CCC
12p
8.9%
843
CCC '20 S2 - Escape Room (Hard)
CCC
15p
5.6%
55
CCC '20 S2 - Escape Room
CCC
10p
12.8%
1696
CCC '20 S1 - Surmising a Sprinter's Speed
CCC
5p
42.8%
2050
CCC '20 J4 - Cyclic Shifts (Hard)
CCC
12p
3.8%
36
CCC '20 J4 - Cyclic Shifts
CCC
5p
45.7%
2293
CCC '20 J3 - Art
CCC
3p
42.8%
2367
CCC '20 J2 - Epidemiology
CCC
3
27.2%
3713
CCC '20 J1 - Dog Treats
CCC
3
56.1%
4021
CCC '19 S5 - Triangle: The Data Structure
CCC
20p
17.9%
359
CCC '19 S4 - Tourism
CCC
20p
7.7%
249
CCC '19 S3 - Arithmetic Square
CCC
12p
13.6%
501
CCC '19 S2 - Pretty Average Primes
CCC
5p
25.9%
2360
CCC '19 S1 - Flipper
CCC
3p
46.1%
3959
CCC '19 J5 - Rule of Three
CCC
20p
0.7%
7
CCC '19 J3 - Cold Compress
CCC
5
46.2%
3166
CCC '19 J2 - Time to Decompress
CCC
3
52.4%
3334
CCC '19 J1 - Winning Score
CCC
3
50.8%
7030
CCC '18 S5 - Maximum Strategic Savings
CCC
20p
26.8%
407
CCC '18 S4 - Balanced Trees
CCC
15p
16.9%
577
CCC '18 S3 - RoboThieves
CCC
12p
14.1%
1135
CCC '18 S2 - Sunflowers
CCC
5p
39.5%
2812
CCC '18 S1 - Voronoi Villages
CCC
3p
33.5%
3578
CCC '18 J5 - Choose your own path
CCC
7p
24.1%
1615
CCC '18 J3 - Are we there yet?
CCC
3
55.6%
3115
CCC '18 J2 - Occupy parking
CCC
3
53.4%
5687
CCC '18 J1 - Telemarketer or not?
CCC
3
40.1%
6900
CCC '17 S5 - RMT
CCC
20p
19.2%
245
CCC '17 S4 - Minimum Cost Flow
CCC
17p
14.1%
771
CCC '17 S3 - Nailed It!
CCC
7p
30.5%
1721
CCC '17 S2 - High Tide, Low Tide
CCC
5
27.8%
2846
CCC '17 S1 - Sum Game
CCC
3
47.4%
3213
CCC '17 J4 - Favourite Times
CCC
5p
23.4%
1572
CCC '17 J3 - Exactly Electrical
CCC
3p
29.9%
2379
CCC '17 J2 - Shifty Sum
CCC
3
54.3%
4586
CCC '17 J1 - Quadrant Selection
CCC
3
60.6%
5590
CCC '16 S5 - Circle of Life
CCC
20p
22.5%
578
CCC '16 S4 - Combining Riceballs
CCC
15p
28.8%
947
CCC '16 S3 - Phonomenal Reviews
CCC
12p
26.4%
1103
CCC '16 S2 - Tandem Bicycle
CCC
5p
53.3%
3507
CCC '16 S1 - Ragaman
CCC
3p
29.7%
2307
«
1
2
...
83
84
85
86
87
88
...
99
100
»