Problems
The sum of the first and the last digits in the number
The sum of the first and the last digits in the number
Find the sum of the first and the last digit of an integer.
\InputFile
One $32$-bit number $n$ that consists of at least two digits. The number $n$ can be positive or negative.
\OutputFile
Print the sum of the first and the last digit of $n$.
Input example #1
2345
Output example #1
7