package leetcode

import "math/rand"

type Solution struct {
	nums []int
}

func Constructor(nums []int) Solution {
	return Solution{
		nums: nums,
	}
}

/** Resets the array to its original configuration and return it. */
func (this *Solution) Reset() []int {
	return this.nums
}

/** Returns a random shuffling of the array. */
func (this *Solution) Shuffle() []int {
	arr := make([]int, len(this.nums))
	copy(arr, this.nums)
	rand.Shuffle(len(arr), func(i, j int) {
		arr[i], arr[j] = arr[j], arr[i]
	})
	return arr
}