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 <iostream>
#include <string>
#include <vector>
#include <queue>
#include <map>
#include <cmath>
#include <climits>
#include <algorithm>
using namespace std;

int main()
{
    long long int A, B;
    char op;
    cin >> A >> op >> B;
    if (op == '+') {
        cout << (A + B) << endl;
    } else {
        cout << (A - B) << endl;
    }

    return 0;
}