// circular rotation moving to right
func rotateRight(arr[]int, rotate int) []int {
    if rotate == 0 || len(arr) == 0 || len(arr) == 1 {
        return arr
    }
    if len(arr) < rotate {
        rotate = rotate % len(arr)
    }
    lhs := arr[len(arr) - rotate:]
    return append(lhs, arr[:len(arr) - rotate]...)
}