Kickstart round D- Alien Piano failed test case

help
1

What should be the output of the following sequence :

1 2 3 2 3 4 3 4 5 4 5 6 5

My output is 1, but the python code in the analysis tab gives 0. Why?

2

You can play the sequence like A, B, C, A, B, C, A, B, C, A, B, C, A without ever violating any rules. Thus the answer 0.

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3

Thanks @kboitmanis , I was making a mistake of assigning the lower pitch sound to the strictly adjacent (-1) key and vice-versa. Hence I was going out of bound.

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