You are given a simple arithmetic expression of the form a?b, where a and b are integer constants, and ? can be one of the following operations: '+' (addition), '-' (subtraction), '*' (multiplication), '/' (integer division) or '%' (modulo operation).

Output the result of evaluation of this expression.

Input

The input is a single line containing an expression a?b. Here a and b are integers between 1 and 999, inclusive; ? is an operation character: '+', '-' (ASCII code 45), '*', '/' or '%'.

Output

Output a single integer — the result of evaluation of this expression.

见题面 Input 部分

见题面 Output 部分