Write a program that reads an operator and two integers.

The operator will be one of:

• + for addition
• - for subtraction
• * for multiplication
• / for division

Print the result of applying the operator to the two integers.

For division, the first integer will always be divisible by the second integer, so the answer will be a whole number.

Input

The input contains one operator followed by two integers on one line.

Output

Output the result.

Sample Input

+ 4 7

Sample Output

11