e-olymp
favorite We need a little bit of your help to keep things running, click on this banner to learn more

Problems

Complexity
All Problems Very simple Simple Average Difficult Very difficult
Classification
All Problems Combinatorics Comforting task Dynamic programming Game theory Graph theory Long arithmetic Modeling Number theory Probability Test problem Others...
1
Simple problem
36700 / 41137
2
Digits
20752 / 27111
3
Match’s model
2671 / 12775
4
Two circles
6802 / 11047
5
Two factors
1812 / 4730
6
The vouchers
1086 / 1711
7
Roman numerals
2343 / 3314
8
Matches
3553 / 5338
9
N-digit numbers
2599 / 3931
10
Gardener
2478 / 3401
11
Big accuracy
3399 / 5251
12
Injured Picture
688 / 1085
13
Spider and Fly
1287 / 2352
14
Rabbit-failure
1393 / 1862
15
Mouse and corns
3217 / 4357
16
Dragon
1421 / 2252
17
Gardener-painter
3085 / 3981
18
Paint2D
639 / 1334
19
Degree of symmetry
5775 / 6893
20
How many times to repeat?
4387 / 6418
21
Corruption
93 / 1395
22
"Mirror prime" numbers
2122 / 3993
23
New-year tree
688 / 1499
24
Paint2D-Crack
38 / 235
25
Paint3D
490 / 729