hdu 2009 求数列和

无聊，刷水题练下java

import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner cin=new Scanner(System.in);
		double n;
		int m;
		while(cin.hasNext())
		{
			n=cin.nextDouble();
			m=cin.nextInt();
			double sum=n;
			for(int i=0;i<m-1;i++)
			{
				sum+=Math.sqrt(n);
				n=Math.sqrt(n);
			}
			System.out.printf("%.2f",sum);
			System.out.println();
		}
	}
}