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 scan = new Scanner(System.in);

		int a = scan.nextInt();
		String op = scan.next();
		int b = scan.nextInt();

		while(true){
			if(op == "+"){
				System.out.println(a + b);
			}else if(op == "-"){
				System.out.println(a - b);
			}else if(op == "*"){
				System.out.println(a * b);
			}else if(op == "/"){
				System.out.println(a / b);
			}else if(op == "?"){
				break;
			}
		}
	}
}