Shuffle a set of numbers without duplicates.
Example:
// Init an array with set 1, 2, and 3. int[] nums = {1,2,3}; Solution solution = new Solution(nums); // Shuffle the array [1,2,3] and return its result. Any permutation of [1,2,3] must equally likely to be returned. solution.shuffle(); // Resets the array back to its original configuration [1,2,3]. solution.reset(); // Returns the random shuffling of array [1,2,3]. solution.shuffle();
class Solution: def __init__(self, nums): """ :type nums: List[int] """ self._items = nums def reset(self): """ Resets the array to its original configuration and return it. :rtype: List[int] """ return self._items def shuffle(self): """ Returns a random shuffling of the array. :rtype: List[int] """ result = [] temp = copy.deepcopy(self._items) while len(temp) != 0: toInsert = temp[random.randint(0,len(temp)-1)] result.append(toInsert) temp.remove(toInsert) return result # Your Solution object will be instantiated and called as such: # obj = Solution(nums) # param_1 = obj.reset() # param_2 = obj.shuffle()