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;
  char op;

  while(1){
    scanf("%d%c%d",&a,&op,&b);
    if(op=='+')  printf("%d\n",a+b);
    else if(op=='-')  printf("%d\n",a-b);
    else if(op=='*')  printf("%d\n",a*b);
    else if(op=='/')  printf("%d\n",a/b);
    else if(op=='?')  break;
  }

  return 0;
}