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 JAVA (judge verdict: Wrong Answer)

import java.util.Scanner;

class Main {
   public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      while (true){
         int a = Integer.parseInt(sc.next());
         String op = sc.next();
         int b = Integer.parseInt(sc.next());
         if ("?".equals(op)) break;
         if ((a >= 0 && a <= 20000) && (b >= 0 && b <= 20000)) {
            if ("+".equals(op)) {
               System.out.println(a + b);
            } else if ("-".equals(op)) {
               System.out.println(a - b);
            } else if ("*".equals(op)) {
               System.out.println(a * b);
            } else if ("/".equals(op)) {
               System.out.println(a / b);
            }
         } break;
      }
   }
}