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 (Clang 3.8.0) (judge verdict: Wrong Answer)

//Atcoder Begineer Contest050
//A - Addition and Subtraction Easy
//2018/06/25 18:50

#include<stdio.h>
#define INF 1000000000

int main(void){

  int A,B;
  int res;
  char op;

  scanf("%d",&A);

  scanf("%d",&B);

  op = getchar();

  if(op == '+'){
    res = A + B;
    printf("%d\n",res);
  }
  else{
    res = A - B;
    printf("%d\n",res);
  }

  return 0;
}