You are given an array of integers and an integer K as arguments. Return the index of the last occurrence of integer K in the array.

Argument Integer K is guaranteed to be found in the array at least once.

Requirements

• Must return a single integer
• Should work with both positive and negative numbers

Example #1

solve([4, 1, 3, 5, 3, 4, 2], 4)
> 5

4 occurs twice, the last occurrence can be found at the 5th index of the array, so we return 5.

Example #2

solve([-1, -1, 3, 5, 3, 2], -1)
> 1

-1 occurs twice, the last occurrence can be found at the 1st index of the array, so we return 1.