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 <algorithm>
#include <cmath>
#include <string>
#include <utility>
#include <climits>
#include <vector>
using namespace std;

#define ll long long int

const int MOD = 1000000007;

int max(int a, int b) {

	if (a > b)return a;
	else return b;

}
int main() {

	ll A, B;
	char op;

	cin >> A >> op >> B;

	if (op == '+')cout << A + B << endl;
	else cout << A - B << endl;

	return 0;
}