Amazing kata !,

• The description could provide an example with n = 14.
• User needs to understand what happens when control reaches at 'z' based on string index.

good Kata !!

I think the function argument itself provides a hint to solve this problem.

What is that ascii diagram, I'm curious.

In real time production code is this recommneded ? since it's not a part of C standard.

Hmm, arr is a pointer to a const integer, good use of arr here.

It's crazy how people are good in using bitwise operators.

should have given you a warning for not including math.h library file.
plus stdio.h file is not required here as you are not performing any IO.

Amazing Kata !

True, excellent Kata, your hint should be included in the description.

Thanks

Read the How it worked part of the kata's description, you can't change horses or hand over the mail bag in the middle of nowhere, only at stations.

Distance          Rider number
19 + 67 = 86      1
34 + 20 + 41 = 95 2
85                3
47                4
65 + 28 = 93      5
54                6
69                7
56 + 6            8
71                9
60                10
88                11
15 + 24           12
77                13
64                14
94                15
98                16
65 + 1            17
42 + 28 + 23 = 93 18
81                19
67                20
35 + 16 = 51      21
85 + 2 = 87       22
50 + 4 + 43 = 97  23

And that's how each rider doesn't ride more than 100 miles each in that case.