Savnet CPP #1
===

# 1. Phone numbers

As a user,
I want to enter a phone number with country code,
So that I know to which country I'll call.

**Hint**: Take the list of prefixes from https://countrycode.org/

## Examples

Input:
`[phone]`

Output:
`Romania`

--

Input:
`[phone]`

Output:
`Canada`

--

Input:
`[phone]`

Output:
`China`

# 2. We're in the Matrix

As a user,
I want to enter an integer matrix dimension N,
So that I get a generated symmetric matrix.

**Acceptance criteria:**
a. validate N input, accept only values between 2 and 5
b. generate the content of the matrix by adding indexes

## Examples

Input:
`1`

Output:
`Invalid matrix dimension. Below range.`

--

Input:
`6`

Output:
`Invalid matrix dimension. Above range.`

--

Input:
`5`

Output:

0 1 2 3 4 
1 2 3 4 5 
2 3 4 5 6 
3 4 5 6 7 
4 5 6 7 8

--

Input:
`2`

Output:

0 1 
1 2 

# 3. Geometry

As a user,
I want to enter a cube's length of a side (in meters),
So that I can calculate its perimeter, area, and volume.

**Hint**: You may want to use a class and implement the 3 methods.

**Acceptance criteria**
a. validate input, accept only positive numbers below 100.

## Examples

Input:
`-1`

Output:
`Invalid side length.`

--

Input:
`105`

Output:
`Invalid side length.`

--

Input:
`10`

Output:

Perimeter: 120 m
Surface: 600 mp
Volume: 1000 mc