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>

int main(void)
{
    int a, b, ans;
    char op;
    scanf("%d %c %d", &a, &op, &b);
    while(1) {
    switch (op) {
    case '+':
        ans = a + b;
        break;
    case '-':
        ans = a - b;
        break;
    case '*':
        ans = a * b;
        break;
    case '/':
        ans = a / b;
        break;
    case '?':
        exit(0);
        break;
    }
    printf("%d\n",  ans);
    }
}