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)

//Keep working hard :)
#include <bits/stdc++.h>
using namespace std;

#define IOS ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

const int N = 1e5+5;
int a[N];

void fileIO()
{
        #ifndef ONLINE_JUDGE
        freopen("int.txt","r",stdin);
        freopen("out.txt","w",stdout);
        #endif
}
int main()
{
	IOS;
        //fileIO();
        int a,b;
        char c;
        cin >> a >> c  >> b;
        switch(c)
        {
                case '+':
                        cout << a+b;
                        exit(0);
                case '-':
                        cout << a-b;
                        exit(0);
        }
	return 0;
}