Problem:
Simple Calculator

Write a program which reads two integers a, b and an operator op, and then prints the value of a op b.

The operator op is '+', '-', '*' or '/' (sum, difference, product or quotient). The division should truncate any fractional part.

Input

The input consists of multiple datasets. Each dataset is given in the following format.

a op b

The input ends with a dataset where op = '?'. Your program should not process for this dataset.

Output

For each dataset, print the value in a line.

Constraints

0 ≤ a, b ≤ 20000

No divisions by zero are given.

Sample Input 1

1 + 2
56 - 18
13 * 2
100 / 10
27 + 81
0 ? 0

Sample Output 1

3
38
26
10
108

Solution in C++ (judge verdict: Time Limit Exceeded)

#include<iostream>

using namespace std;

int main() {
    int a,b;
    char c;
    while(1){
        switch(c){
            case'?' : break;
            case'+' : cout << a+b; break;
            case'-' : cout << a-b; break;
            case'*' : cout << a*b; break;
            case'/' : cout << a/b; break;
        }
    cout << endl;
    if(c == '?') break;
    }
}