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
...
50
51
52
53
54
55
...
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 J3 - Bronze Count
CCC '00 S1 - Slot Machines
CCC '19 S2 - Pretty Average Primes
Problem
Category
Points ▾
AC %
Users
Mock CCC '18 Contest 3 J5/S3 - A Cookie-Cutter Problem
Mock CCC
10p
10.0%
59
Mock CCC '18 Contest 3 S4 - A Graph Problem
Mock CCC
10
25.7%
213
Mock CCC '18 Contest 5 S4 - Sparse Binary String Counting
Mock CCC
10p
18.3%
92
CTU Open Contest 2017 - Shooting Gallery
ICPC
10
17.0%
10
Longest Increasing Subsequence
Classics
10
23.6%
545
Baltic OI '07 P3 - Sound
Baltic OI
10p
33.2%
276
DMPG '18 G1 - Musical Chairs
DMOPC
10p
27.2%
292
Mock CCO '18 Contest 3 Problem 4 - Roger Solves A Classic Rage Tree Problem
Mock CCO
10p
50.3%
317
TLE '17 Contest 8 P3 - Curious Numbers
TLE
10p
14.3%
70
Baltic OI '18 P2 - Martian DNA
Baltic OI
10p
35.3%
148
ECOO '18 R3 P3 - Currency Exchange
ECOO
10p
8.1%
13
ECOO '18 R2 P2 - Homework
ECOO
10p
21.6%
95
CCO '18 P1 - Geese vs. Hawks
CCO
10p
37.6%
569
Double Doors Regional P4 - Tudor Teaches Jason How To Be Productive
Uncategorized
10
13.1%
40
Knapsack 3
Uncategorized
10p
26.3%
251
XOR Sum
Uncategorized
10
45.2%
234
UTS Open '18 P4 - Ianine's Lil Lab
Uncategorized
10p
28.8%
87
Back To School '18: An FFT Problem
Seasonal
10p
25.9%
111
Back To School '18: Beautiful Trees
Seasonal
10p
15.2%
102
Another Contest 1 Problem 3 - Poutine
ACC
10
4.1%
58
DMOPC '18 Contest 2 P3 - Thanksgiving Feast
DMOPC
10p
41.4%
307
Another Contest 2 Problem 2 - Poutine
ACC
10
28.7%
143
GlobeX Cup '18 S3 - Playing With Bits
Uncategorized
10p
15.3%
46
GlobeX Cup '18 S4 - Reversed Dijkstra's
Uncategorized
10p
10.9%
42
GlobeX Cup '18 J5 - Errands
Uncategorized
10p
23.6%
177
DMOPC '18 Contest 3 P3 - Bob and Math Class
DMOPC
10p
15.1%
55
COCI '09 Contest 1 #4 Mali
COCI
10
27.7%
97
DMOPC '18 Contest 4 P3 - Dr. Henri and Ionization
DMOPC
10p
43.5%
116
Educational DP Contest AtCoder I - Coins
Uncategorized
10
54.0%
339
Educational DP Contest AtCoder K - Stones
Uncategorized
10
53.9%
436
Educational DP Contest AtCoder L - Deque
Uncategorized
10
55.1%
458
Educational DP Contest AtCoder G - Longest Path
Uncategorized
10
47.8%
452
Mock CCC '19 Contest 2 J5 - Tudor Drinks Even More Tea
Mock CCC
10p
7.5%
36
Appleby Contest '19 P5 - Matrix Operation
Uncategorized
10p
33.0%
283
Mock CCC '19 Contest 2 S3 - Tudor Tallies Triangular Totals
Mock CCC
10p
5.4%
62
CTU Open Contest 2018 - Security Guards
ICPC
10
37.8%
31
CTU Open Contest 2018 - Horsemeet
ICPC
10
71.9%
13
CTU Open Contest 2018 - Rullete
ICPC
10
19.4%
10
CCO '96 P2 - SafeBreaker
CCO
10
36.2%
89
COCI '17 Contest 2 #3 Doktor
COCI
10
21.0%
56
DMOPC '18 Contest 6 P3 - Wish Upon a Star
DMOPC
10p
45.0%
386
DMOPC '18 Contest 6 P4 - Tank
DMOPC
10
18.0%
126
Fast Bit Duplication
Uncategorized
10
32.3%
48
COCI '15 Contest 5 #3 Perica
COCI
10p
29.4%
159
COCI '18 Contest 1 #3 Cipele
COCI
10p
28.0%
171
COCI '15 Contest 6 #3 Pianino
COCI
10
28.9%
18
COCI '18 Contest 6 #3 Sličice
COCI
10p
52.5%
79
ECOO '19 R1 P3 - Side Scrolling Simulator
ECOO
10p
10.5%
66
DMPG '19 S3 - Chemical Counting Capers
DMOPC
10p
11.5%
49
CEOI '17 P2 - Sure Bet
CEOI
10p
35.8%
81
«
1
2
...
50
51
52
53
54
55
...
99
100
»