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: Wrong Answer)

#include<stdio.h>
int main(void)
{
  int num1,num2;
  char ope,str[16];
  fgets(str,sizeof(str),stdin);
  sscanf(str,"%d %c %d",&num1,&ope,&num2);
  switch (ope)
  {
    case '+':
      printf("%d\n",num1+num2);
      break;
    case '-':
      printf("%d\n",num1-num2);
      break;
    default:
      printf("error\n");
      break;
  }
  return 0;
}