Add solution and test-cases for problem 1863

Author: 0xff-dev

leetcode/1801-1900/1863.Sum-of-All-Subset-XOR-Totals/README.md

@@ -1,28 +1,53 @@
 # [1863.Sum of All Subset XOR Totals][title]
 
-> [!WARNING|style:flat]
-> This question is temporarily unanswered if you have good ideas. Welcome to [Create Pull Request PR](https://github.com/kylesliu/awesome-golang-algorithm)
-
 ## Description
+The **XOR total** of an array is defined as the bitwise XOR of **all its elements**, or `0` if the array is **empty**.
+
+- For example, the **XOR total** of the array `[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: a = "11", b = "1"
-Output: "100"
+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
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Sum of All Subset XOR Totals
-```go
 ```
+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.
+```
 
 ## 结语
 

leetcode/1801-1900/1863.Sum-of-All-Subset-XOR-Totals/Solution.go

@@ -1,5 +1,27 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(nums []int) int {
+	ans := 0
+	for i := 0; i < len(nums); i++ {
+		// l = 1
+		ans += nums[i]
+	}
+
+	var selector func(int, int, int)
+	selector = func(index, l, cur int) {
+		if l == 0 {
+			ans += cur
+			return
+		}
+		if index == len(nums) {
+			return
+		}
+
+		selector(index+1, l, cur)
+		selector(index+1, l-1, cur^nums[index])
+	}
+	for l := 2; l <= len(nums); l++ {
+		selector(0, l, 0)
+	}
+	return ans
 }

leetcode/1801-1900/1863.Sum-of-All-Subset-XOR-Totals/Solution_test.go

@@ -10,12 +10,12 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
-		expect bool
+		inputs []int
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []int{1, 3}, 6},
+		{"TestCase2", []int{5, 1, 6}, 28},
+		{"TestCase3", []int{3, 4, 5, 6, 7, 8}, 480},
 	}
 
 	//	开始测试
@@ -30,10 +30,10 @@ func TestSolution(t *testing.T) {
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }