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(){

    char a;
    int v1,v2;

    scanf("%d", &v1);
    scanf("%s", &a);
    if(strncmp(&a,"+",1)==0){
        scanf("%d", &v2);
        printf("%d",v1+v2);
    }

    else{
        scanf("%d", &v2);
        printf("%d",v1-v2);
    }

    return 0;
}