100 99
1 0
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1 2 2
2 3 2
3 4 2
4 5 2
5 6 2
6 7 2
7 8 2
8 9 2
9 10 2
10 11 2
11 12 2
12 13 2
13 14 2
14 15 2
15 16 2
16 17 2
17 18 2
18 19 2
19 20 2
20 21 2
21 22 2
22 23 2
23 24 2
24 25 2
25 26 2
26 27 2
27 28 2
28 29 2
29 30 2
30 31 2
31 32 2
32 33 2
33 34 2
34 35 2
35 36 2
36 37 2
37 38 2
38 39 2
39 40 2
40 41 2
41 42 2
42 43 2
43 44 2
44 45 2
45 46 2
46 47 2
47 48 2
48 49 2
49 50 2
50 51 2
51 52 2
52 53 2
53 54 2
54 55 2
55 56 2
56 57 2
57 58 2
58 59 2
59 60 2
60 61 2
61 62 2
62 63 2
63 64 2
64 65 2
65 66 2
66 67 2
67 68 2
68 69 2
69 70 2
70 71 2
71 72 2
72 73 2
73 74 2
74 75 2
75 76 2
76 77 2
77 78 2
78 79 2
79 80 2
80 81 2
81 82 2
82 83 2
83 84 2
84 85 2
85 86 2
86 87 2
87 88 2
88 89 2
89 90 2
90 91 2
91 92 2
92 93 2
93 94 2
94 95 2
95 96 2
96 97 2
97 98 2
98 99 2
99 100 2