case 3 failed: expected 3 got 1
input:
52
10 36
9 7
19 14
23 0
2 21
4 53
7 23
0 56
21 53
23 41
15 59
2 23
4 3
12 55
18 8
6 50
2 36
23 45
10 59
3 24
23 50
15 56
6 46
7 27
2 39
21 14
15 10
0 14
23 49
18 36
9 51
7 45
18 26
6 5
12 24
15 11
6 33
2 32
11 52
0 53
22 23
16 52
7 16
15 2
23 50
16 23
14 53
23 50
2 59
2 46
4 8
22 3
exit status 1