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
...
51
52
53
54
55
56
...
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
Problem types
Ad Hoc
Advanced Math
Brute Force
Capture the Flag
Constructive
Data Structures
Divide and Conquer
Dynamic Programming
Game Theory
Geometry
Graph Theory
Greedy Algorithms
Implementation
Interactive
Intermediate Math
Recursion
Regular Expressions
Simple Math
Simulation
String Algorithms
Uncategorized
Point range
Go
Random
Hot problems
Arcadia Computing Contest 1 P3 - ScanTron
COCI '15 Contest 6 #1 Bela
CCC '22 J3 - Harp Tuning
CCC '23 J3 - Special Event
CCC '20 J4 - Cyclic Shifts
COCI '18 Contest 5 #2 Jarvis
CCC '20 S1 - Surmising a Sprinter's Speed
Problem
Category
Types
Points
AC %
Users
ECOO '13 R2 P1 - Upsetris
ECOO
Implementation
5p
38.2%
33
ECOO '13 R2 P2 - The Walking Dead
ECOO
Geometry
7p
41.4%
10
ECOO '13 R2 P3 - Last Robot Standing
ECOO
Simulation
7p
45.0%
7
ECOO '13 R2 P4 - Breaking Rocks
ECOO
Dynamic Programming
10p
58.6%
12
ECOO '13 R3 P1 - Irregular Expressions
ECOO
String Algorithms
5p
20.9%
17
ECOO '13 R3 P2 - Mutant Children
ECOO
Dynamic Programming
10p
37.5%
13
ECOO '13 R3 P3 - Go With the Flow
ECOO
Graph Theory
10p
32.4%
10
ECOO '13 R3 P4 - Tour de Force
ECOO
Dynamic Programming
12p
48.9%
78
ECOO '14 R1 P1 - Martian Time
ECOO
Simple Math
5p
26.4%
76
ECOO '14 R1 P2 - Orphan Black
ECOO
Implementation
5p
66.2%
37
ECOO '14 R1 P3 - Word Search
ECOO
Brute Force
7p
40.9%
97
ECOO '14 R1 P4 - Fischer Random Chess
ECOO
Simulation
5p
37.3%
37
ECOO '14 R2 P1 - Scratch and Win
ECOO
Implementation
5p
9.0%
38
ECOO '14 R2 P2 - Black and Grey
ECOO
Simple Math
5p
42.9%
28
ECOO '14 R2 P3 - EasySweeper
ECOO
Simulation
10p
41.1%
16
ECOO '14 R2 P4 - What Lies Ahead
ECOO
Graph Theory
10p
27.6%
18
ECOO '14 R3 P1 - Substitute Teacher
ECOO
Simple Math
5p
49.0%
24
ECOO '14 R3 P2 - Mothers and Daughters
ECOO
Graph Theory
7p
59.6%
88
ECOO '14 R3 P3 - Future City
ECOO
Graph Theory
10p
26.5%
26
ECOO '14 R3 P4 - Baby Talk
ECOO
Dynamic Programming
,
String Algorithms
10p
59.6%
30
ECOO '15 R1 P1 - When You Eat Your Smarties
ECOO
Simple Math
5p
24.1%
1194
ECOO '15 R1 P2 - Word Wrap
ECOO
Implementation
10p
24.2%
148
ECOO '15 R1 P3 - Ten Pin Trig
ECOO
Geometry
10p
37.5%
42
ECOO '15 R1 P4 - Neanderthal Numbers
ECOO
Dynamic Programming
10p
34.2%
210
ECOO '15 R2 P1 - The Interlace Cypher
ECOO
Implementation
7p
46.0%
76
ECOO '15 R2 P2 - So So
ECOO
Recursion
,
Simulation
12p
17.0%
10
ECOO '15 R2 P3 - Lucas' Other Tower
ECOO
Ad Hoc
10p
46.6%
310
ECOO '15 R2 P4 - Rectangle Roundup
ECOO
Implementation
,
Simple Math
12p
32.9%
17
ECOO '15 R3 P1 - Just the Factoradics, Ma'am
ECOO
Greedy Algorithms
7p
47.6%
38
ECOO '15 R3 P2 - Tiling Trouble
ECOO
Geometry
15p
20.0%
2
ECOO '15 R3 P3 - Roadie Cross
ECOO
Graph Theory
,
Greedy Algorithms
10p
13.8%
6
ECOO '15 R3 P4 - Under the Rug
ECOO
Ad Hoc
12p
8.7%
2
ECOO '16 R1 P1 - Pass or Fail
ECOO
Simple Math
5p
26.2%
304
ECOO '16 R1 P2 - Spindie
ECOO
Data Structures
,
Simple Math
7p
24.0%
187
ECOO '16 R1 P3 - Railway Sort
ECOO
Ad Hoc
7p
39.1%
335
ECOO '16 R1 P4 - Kayenne
ECOO
Implementation
7p
28.7%
41
ECOO '16 R2 P1 - Palindrome Panic
ECOO
Implementation
,
String Algorithms
12p
14.8%
89
ECOO '16 R2 P2 - CC+
ECOO
Implementation
7p
30.6%
51
ECOO '16 R2 P3 - BattleShip
ECOO
Implementation
7p
33.9%
33
ECOO '16 R2 P4 - Hop, Skip and Jump
ECOO
Ad Hoc
,
Graph Theory
,
Implementation
12p
27.9%
18
ECOO '16 R3 P1 - Nerd Poker
ECOO
Brute Force
,
Simple Math
7p
12.9%
11
ECOO '16 R3 P2 - Target Practice
ECOO
Geometry
,
Simple Math
10p
22.2%
15
ECOO '16 R3 P3 - CamelCase
ECOO
Dynamic Programming
10p
24.9%
183
ECOO '16 R3 P4 - Cuthbert's Calculator
ECOO
Constructive
,
Simulation
15p
68.2%
5
ECOO '17 R1 P1 - Munch 'n' Brunch
ECOO
Ad Hoc
5p
18.4%
931
ECOO '17 R1 P2 - Chocolate Chewsday
ECOO
Ad Hoc
5p
11.1%
83
ECOO '17 R1 P3 - Mountain View
ECOO
Brute Force
7p
13.3%
75
ECOO '17 R1 P4 - Almost Sorted
ECOO
Ad Hoc
7p
9.2%
61
ECOO '17 R2 P1 - Wizard's Windows
ECOO
Implementation
5p
53.8%
68
ECOO '17 R2 P2 - Treasure Hunt
ECOO
Graph Theory
10p
41.1%
59
«
1
2
...
51
52
53
54
55
56
...
100
101
»