代码:
1 import java.util.*;
2 public class Main {
3 public static void main (String [] args) {
4 int repeat,n;
5 Scanner s=new Scanner(System.in);
6 repeat=s.nextInt();
7 for(int i=1;i<=repeat;i++) {
8 n=s.nextInt();
9 double sum=0;
10 for(int j=1;j<=n;j++) {
11 sum+=1.0/j;
12 }
13 System.out.println(String.format("%.2f", sum));
14 }
15 }
16 }