Thanks, it was kotlin though and didnt mutate the input. Just had this line for (i in arr) print("$i ") in to print out the input array elements

Why would 0 be expected for this input? Clearly the sign chanfes once

testFixedZero
 
> 4 1 0 -1 -2 -3 

expected:<0> but was:<1>

Attempting to solve this in Kotlin and getting the time out error :(

After logging out the params, I realised one of the test failing is this and I do not understand why

bouncingBall(2.0, 0.5, 1.0)
expected:<1> but was:<2>

With those input paramaters, why would it be 1 not 2 ie (once going down + 1 bounce)