public class Solution extends Object
1863 - Sum of All Subset XOR Totals.
Easy
The XOR total of an array is defined as the bitwise XOR of all its elements , or 0 if the array is empty.
[2,5,6] is 2 XOR 5 XOR 6 = 1.Given an array nums, return the sum of all XOR totals for every subset of nums.
Note: Subsets with the same elements should be counted multiple times.
An array a is a subset of an array b if a can be obtained from b by deleting some (possibly zero) elements of b.
Example 1:
Input: nums = [1,3]
Output: 6
Explanation: The 4 subsets of [1,3] are:
The empty subset has an XOR total of 0.
[1] has an XOR total of 1.
[3] has an XOR total of 3.
[1,3] has an XOR total of 1 XOR 3 = 2.
0 + 1 + 3 + 2 = 6
Example 2:
Input: nums = [5,1,6]
Output: 28
Explanation: The 8 subsets of [5,1,6] are:
The empty subset has an XOR total of 0.
[5] has an XOR total of 5.
[1] has an XOR total of 1.
[6] has an XOR total of 6.
[5,1] has an XOR total of 5 XOR 1 = 4.
[5,6] has an XOR total of 5 XOR 6 = 3.
[1,6] has an XOR total of 1 XOR 6 = 7.
[5,1,6] has an XOR total of 5 XOR 1 XOR 6 = 2.
0 + 5 + 1 + 6 + 4 + 3 + 7 + 2 = 28
Example 3:
Input: nums = [3,4,5,6,7,8]
Output: 480
Explanation: The sum of all XOR totals for every subset is 480.
Constraints:
1 <= nums.length <= 121 <= nums[i] <= 20| Constructor and Description |
|---|
Solution() |
| Modifier and Type | Method and Description |
|---|---|
int |
subsetXORSum(int[] nums) |
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