POJ1003

 题目http://acm.pku.edu.cn/JudgeOnline/problem?id=1003

 

1. import java.io.BufferedInputStream;
2. import java.util.Scanner;
5. public class Main {
7.     public static void main(String[] args) {
8.         Scanner scan = new Scanner(new BufferedInputStream(System.in));
9.         double length;
10.         double sum ;
11.         int cards ;
12.         while ((length = scan.nextDouble()) != 0.00) {
13.             cards = 1;
14.             sum = 0.5;
15.             while(sum < length){
16.                 cards++;
17.                 sum += 1.0/(cards+1);
18.             }
19.             System.out.println(cards + " card(s)");
20.         }
21.     }
22. }