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
...
47
48
49
50
51
52
...
100
101
»
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 '20 S4 - Swapping Seats
CCC '24 J4 - Troublesome Keys
Dynamic Range Minimum Test
CCC '13 S1 - From 1987 to 2013
CCC '09 J3 - Good Times
Mock CCC '22 Contest 2 J3 - Figure Skating Fun
CCC '20 S2 - Escape Room
Problem
Category
Points
AC %
Users
DWITE '02 R2 #5 - Now I know my ABCs
DWITE
5
39.1%
136
DWITE '06 R5 #1 - Points on a Line
DWITE
7
36.4%
78
DWITE '06 R5 #2 - Floppy Disk
DWITE
7p
56.8%
111
DWITE '06 R5 #3 - UPC Check Digit
DWITE
5
38.7%
107
DWITE '06 R5 #4 - Connect-4
DWITE
7
56.4%
43
DWITE '06 R5 #5 - Prime Palindromes
DWITE
10
26.4%
253
DWITE '07 R1 #1 - Vanilla Primes
DWITE
3
24.5%
683
DWITE '07 R1 #2 - Cubes in a Pyramid
DWITE
3p
17.4%
351
DWITE '07 R1 #3 - Where's my QWERTY?
DWITE
3
41.5%
102
DWITE '07 R1 #4 - Stacks of Blocks
DWITE
5
36.6%
261
DWITE '07 R1 #5 - Velociraptor Maze
DWITE
7
13.9%
43
DWITE '07 R2 #1 - Not Quite Prime
DWITE
5
57.5%
351
DWITE '07 R2 #2 - Show Me The Money!
DWITE
3
35.0%
157
DWITE '07 R2 #3 - Floor Plan
DWITE
7
67.8%
127
DWITE '07 R2 #4 - All Is Balanced
DWITE
5
24.4%
302
DWITE '07 R2 #5 - Bridges In A Graph
DWITE
7
20.6%
353
DWITE '07 R3 #1 - Yet Another Primes Question
DWITE
5
58.6%
172
DWITE '07 R3 #2 - There's An Essay In My Code
DWITE
5
30.2%
221
DWITE '07 R3 #3 - Playlist
DWITE
7
44.1%
150
DWITE '07 R3 #4 - The Convex Fence Company
DWITE
10
21.5%
24
DWITE '07 R3 #5 - Portals
DWITE
7
50.0%
39
DWITE '07 R4 #1 - Curve-shot
DWITE
5
56.0%
33
DWITE '07 R4 #2 - And the winner is...
DWITE
5
35.2%
82
DWITE '07 R4 #3 - Don't follow my links
DWITE
5
54.7%
11
DWITE '07 R4 #4 - Shortest path around
DWITE
7
41.5%
206
DWITE '07 R4 #5 - It all adds up
DWITE
7
55.6%
13
DWITE '07 R5 #1 - I heart you
DWITE
3
32.4%
79
DWITE '07 R5 #2 - Number of factors
DWITE
5
42.1%
346
DWITE '07 R5 #3 - Parity bit
DWITE
5
70.0%
109
DWITE '07 R5 #4 - Train ride
DWITE
7
54.1%
38
DWITE '07 R5 #5 - Tetris!
DWITE
7
25.9%
6
DWITE '08 R1 #1 - LaNDscAPE ii
DWITE
3
64.3%
55
DWITE '08 R1 #2 - Simple Checksum
DWITE
3
51.6%
112
DWITE '08 R1 #3 - School's a maze
DWITE
7
50.4%
49
DWITE '08 R1 #4 - What is this Roman Numeral
DWITE
7
62.3%
160
DWITE '08 R1 #5 - Moving Stuff in Boxes
DWITE
7
43.5%
18
DWITE '08 R2 #1 - My shiny digital key
DWITE
3
37.9%
63
DWITE '08 R2 #2 - My favourite digit
DWITE
3
59.2%
309
DWITE '08 R2 #3 - My drink is made of cubes
DWITE
5
38.1%
21
DWITE '08 R2 #4 - Big shiny tunes
DWITE
7
62.1%
95
DWITE '08 R2 #5 - Water damage
DWITE
7
22.9%
34
DWITE '08 R3 #1 - ASCII Rhombus
DWITE
5
68.8%
57
DWITE '08 R3 #2 - Wordcount++
DWITE
5
36.6%
479
DWITE '08 R3 #3 - Unicorns and Teaspoons
DWITE
5
68.9%
35
DWITE '08 R3 #4 - Time for change
DWITE
7
60.9%
280
DWITE '08 R3 #5 - Now in 3D
DWITE
7
75.0%
31
DWITE '08 R4 #1 - Four player Pong with no players
DWITE
7
71.4%
59
DWITE '08 R4 #2 - Tic Tac Win
DWITE
5
38.1%
75
DWITE '08 R4 #3 - Secret party
DWITE
7
39.2%
58
DWITE '08 R4 #4 - Shortest path around v2
DWITE
7
47.8%
170
«
1
2
...
47
48
49
50
51
52
...
100
101
»