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: Time Limit Exceeded)

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = scanner.nextInt();
        String op = scanner.next();
        int b = scanner.nextInt();
         while(true){
        if ( op =="+"){
            System.out.println(a+b);
            if( op =="-"){
                System.out.println(a-b);
                if( op=="*"){
                    System.out.println(a*b);
                    if(op=="/"){
                        System.out.print(a/b);
                        if(op=="?"){
                            break;
                        }
                    }
                }
            }
        }
    }
    }}