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>
#include <string.h>

int main(void)
{
  char op[1];
  int a, b;
  int result;
  scanf("%d %s %d", &a, op, &b);

  char plus[] = "+";
  char minus[] = "-";

  if (!strcmp(op, plus)) {
    printf("%d", a + b);
  } else if (!strcmp(op, minus)) {
    printf("%d", a - b);
  }
  return 0;
}