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: Runtime Error)

#include <stdio.h>
 
int main(void)
{
  int num1;
  char op;
  int num3;
  
  scanf("%d %c %d",num1,op,num3);
  
  if(op=='+'){
    printf("%d\n",num1+num3);
  }
  else if(op=='-'){
    printf("%d\n",num1-num3);
  }
  
  return 0;
}