#### Find Last Occurrence of Integer in Array

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.*