0: -1
1: 0
2: 1
3: 1
4: 2
5: 2
6: 2
7: 2
8: 3
9: 3
10: 3
11: 3
12: 3
13: 3
14: 3
15: 3
16: 4
17: 4
18: 4
19: 4
20: 4
21: 4
22: 4
23: 4
24: 4
25: 4
26: 4
27: 4
28: 4
29: 4
30: 4
31: 4
32: 5
33: 5
34: 5
35: 5
36: 5
37: 5
38: 5
39: 5
40: 5
41: 5
42: 5
43: 5
44: 5
45: 5
46: 5
47: 5
48: 5
49: 5
50: 5
51: 5
52: 5
53: 5
54: 5
55: 5
56: 5
57: 5
58: 5
59: 5
60: 5
61: 5
62: 5
63: 5
64: 6
65: 6
66: 6
67: 6
68: 6
69: 6
70: 6
71: 6
72: 6
73: 6
74: 6
75: 6
76: 6
77: 6
78: 6
79: 6
80: 6
81: 6
82: 6
83: 6
84: 6
85: 6
86: 6
87: 6
88: 6
89: 6
90: 6
91: 6
92: 6
93: 6
94: 6
95: 6
96: 6
97: 6
98: 6
99: 6