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>

int main()
{
    int a,b;
    char O;
    scanf("%d %c %d",&a,&O,&b);
    if(1<=a && a<=1000000000 && 1<=b && b<=1000000000){
        if(O=='+') printf("%d",a+b);
        if(O=='-') printf("%d",a-b);
    }
return 0;
}