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 <stdio.h>
//#include <string.h>

int main() {
    char op;
    int a, b, val;

    while (1) {
        scanf("%d %c %d", &a, &op, &b);

        if (op == '?' && a == 0 && b == 0)
            break;

        if (op == '+')
            val = a + b;
        else if (op == '-')
            val = a - b;
        else if (op == '*')
            val = a * b;
        else
            val = a / b;

        printf("%d\n", val);
    }

    return 0;
}