Problems

Simple problem#1

Very easy · Math

Digits#2

Very easy · For Beginners

Match’s model#3

Medium · Geometry

Two circles#4

Easy · Geometry · For Beginners

Two factors#5

Medium · Number theory · Prime factorization · Combinatorics

The Vouchers#6

Hard · Dynamic programming · Brute force

Roman numerals#7

Easy · Strings

Matches#8

Easy · For Beginners

N-digit numbers#9

Very easy · Brute force

Gardener#10

Easy · Greedy algorithms · Math

Easy · Number theory

Easy · Geometry

Easy · Geometry

Very easy · Prime factorization · Brute force

Mouse and corns#15

Medium · Dynamic programming

Dragon#16

Medium · Implementation · Math

Gardener-painter#17

Easy · Combinatorics · Dynamic programming

Paint2D#18

Medium · Dynamic programming

Degree of symmetry#19

Very easy · Implementation

How many times to repeat?#20

Easy · Implementation

Corruption#21

Easy · Sorting · Greedy algorithms

"Mirror prime" numbers#22

Easy · Brute force

New-year tree#23

Medium · Combinatorics · Math

Paint2D-Crack#24

Hard · Dynamic programming · Combinatorics · Greedy algorithms

Paint3D#25

Easy · Dynamic programming

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