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 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
#include<string.h>

int main(void){
  long a, b;
  char op[10];

  scanf("%ld", &a);
  scanf("%s", op);
  scanf("%ld", &b);

  if(strcmp(op, "+") == 0){
    printf("%ld\n", a+b);
  }else{
    printf("%ld\n", a-b);
  }

  return 0;
}