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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
using namespace std;


void solve(long long A, std::string op, long long B){
int res;
if(op == "+"){
    res =A+B;
}
else if(op == "-"){
    res=A-B;
}
cout<<res<<endl;
}

int main(){
    long long A;
    scanf("%lld",&A);
    std::string op;
    std::cin >> op;
    long long B;
    scanf("%lld",&B);
    solve(A, op, B);
    return 0;
}