e-olymp
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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
37054 / 41520
2
Digits
21001 / 27423
3
Match’s model
2708 / 12958
4
Two circles
6875 / 11162
5
Two factors
1837 / 4785
6
The vouchers
1102 / 1738
7
Roman numerals
2370 / 3351
8
Matches
3592 / 5391
9
N-digit numbers
2629 / 3981
10
Gardener
2503 / 3432
11
Big accuracy
3415 / 5294
12
Injured Picture
696 / 1096
13
Spider and Fly
1307 / 2390
14
Rabbit-failure
1410 / 1884
15
Mouse and corns
3256 / 4400
16
Dragon
1440 / 2272
17
Gardener-painter
3112 / 4022
18
Paint2D
649 / 1346
19
Degree of symmetry
5865 / 7005
20
How many times to repeat?
4428 / 6486
21
Corruption
93 / 1412
22
"Mirror prime" numbers
2211 / 4110
23
New-year tree
698 / 1524
24
Paint2D-Crack
38 / 238
25
Paint3D
498 / 742