Cannot figure out why no test cases are passing

#1

I believe the logic is correct and the custom cases are giving correct output but none of the test cases are passing

#2

Save your code on ide.codingblocks.com and share its link.

#3
#4

Consider a 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.(but your code gives 7)
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

#5

got it…thnx alot!!!