Problem:
Score : 100 points

Problem Statement

Joisino wants to evaluate the formula "A op B".
Here, A and B are integers, and the binary operator op is either + or -.
Your task is to evaluate the formula instead of her.

Constraints

1≦A,B≦10^9

op is either + or -.

Input

The input is given from Standard Input in the following format:

A op B

Output

Evaluate the formula and print the result.

Sample Input 1

1 + 2

Sample Output 1

3

Since 1 + 2 = 3, the output should be 3.

Sample Input 2

5 - 7

Sample Output 2

-2

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
int main()
{
    int a,b,r;
    char op;
    scanf("%d %c %d",&a,&op,&b);
    switch(op)
    {
    case '+':
        {
          r=a+b;
          printf("%d\n",r);
          break;
        }
    case '-':
        {
            r=a-b;
            printf("%d\n",r);
            break;
        }

    }
    return 0;

}