N= 25  f= 25.016000
1   0
2   1
3   0
4   1
5   0
6   0
7   0
8   0
9   0
10   1
11   1
12   0
13   0
14   1
15   0
16   1
17   0
18   1
19   1
20   0
21   1
22   0
23   1
24   0
25   0