Competitions

# December 2 - BMTK Programming School, Small League

# The sum of the first and last digits of the number

Find the sum of the first and the last digit of an integer.

#### Input

One **32**-bit number that consists of at least **2** digits. The number can be positive or negative.

#### Output

Print the sum of the first and the last digit of an integer.

Input example #1

2345

Output example #1

7