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){

  unsigned short a, b;
  int sum, dif, mul, dev;
  char op;

  while(1){

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

 if (op == '?') break;
  /*tashizan*/
  else if (op == '+'){
    sum = (a + b);
    printf("%d\n",sum);}
  /*hikizan*/
  else if (op == '-'){
    dif = (a - b);
    printf("%d\n",dif);}
  /*kakezan*/
  else if (op == '*'){
    mul = (a * b);
    printf("%d\n",mul);}
  /*warizan*/
  else if (op == '/'){
    dev = (a / b);
    printf("%d\n",dev);}

  }

  return 0;
}