hdu 2178 猜数字

import java.util.Scanner;

public class Main {
   public static void main(String[] args){
	   Scanner input = new Scanner(System.in);
	   
	   int numberFir = input.nextInt();
	   int numberSec,i;
	   int numberSum;
	   int temp = 0;
	   
	   while(true){
		   numberSec = input.nextInt();
		   numberSum = 1;
		   temp += 1;
		   for(i = 0; i<numberSec; i++){
			   numberSum *= 2;
		   }
		   numberSum -= 1;
		   System.out.println(numberSum);
		   if(temp == numberFir)
			   break;
	   }
   }
}

用java写的，新的做法新的感受。。。。。