1 0
2 [2, 20]
2 1
3 [2, 20]
3 1
4 [2, 20]
4 1
5 [2, 20]
5 [5, 15]
5 2
6 [2, 20]
6 [5, 15]
6 2
7 [2, 20]
7 [5, 15]
7 [7, 20]
7 [7, 9]
7 4
8 [2, 20]
8 [5, 15]
8 [7, 20]
8 [7, 9]
8 4
9 [2, 20]
9 [5, 15]
9 [7, 20]
9 [7, 9]
9 4
10 [2, 20]
10 [5, 15]
10 [10, 16]
10 [7, 20]
10 4
11 [2, 20]
11 [5, 15]
11 [10, 16]
11 [7, 20]
11 4
12 [2, 20]
12 [5, 15]
12 [10, 16]
12 [7, 20]
12 4
13 [2, 20]
13 [5, 15]
13 [10, 16]
13 [7, 20]
13 4
14 [2, 20]
14 [5, 15]
14 [10, 16]
14 [7, 20]
14 4
15 [2, 20]
15 [5, 15]
15 [10, 16]
15 [7, 20]
15 4
16 [2, 20]
16 [10, 16]
16 [7, 20]
16 3
17 [2, 20]
17 [7, 20]
17 2
18 [2, 20]
18 [7, 20]
18 2
19 [2, 20]
19 [7, 20]
19 2
4