First test case not getting passed provided example is working

#1

First test case not getting passed provided example is working

#2

Crosscheck with this case:
1
25
37 45
75 76
76 91
64 78
10 53
13 24
94 99
89 92
82 84
77 87
65 73
55 77
43 99
32 37
90 95
30 53
97 99
77 91
93 99
13 64
26 51
7 39
31 50
11 14
33 79

The output must be 8.
It is formed by picking activities:
32 37
37 45
65 73
75 76
82 84
89 92
97 99

Refer this https://ide.codingblocks.com/s/283247

#3

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