Add solution and test-cases for problem 965

leetcode/901-1000/0965.Univalued-Binary-Tree/README.md

@@ -1,28 +1,27 @@
 # [965.Univalued Binary Tree][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
+A binary tree is **uni-valued** if every node in the tree has the same value.
+
+Given the `root` of a binary tree, return `true` if the given tree is **uni-valued**, or `false` otherwise.
+
+**Example 1:**  
 
-**Example 1:**
+![1](./unival_bst_1.png)
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: root = [1,1,1,1,1,null,1]
+Output: true
 ```
 
-## 题意
-> ...
+**Example 2:**  
 
-## 题解
+![2](./unival_bst_2.png)
 
-### 思路1
-> ...
-Univalued Binary Tree
-```go
 ```
-
+Input: root = [2,2,2,5,2]
+Output: false
+```
 
 ## 结语
 

leetcode/901-1000/0965.Univalued-Binary-Tree/Solution.go

@@ -1,5 +1,26 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+type TreeNode struct {
+	Val         int
+	Left, Right *TreeNode
+}
+
+func Solution(root *TreeNode) bool {
+	if root == nil {
+		return true
+	}
+	ok := true
+	if root.Left != nil {
+		if root.Val != root.Left.Val {
+			return false
+		}
+		ok = ok && Solution(root.Left)
+	}
+	if root.Right != nil {
+		if root.Val != root.Right.Val {
+			return false
+		}
+		ok = ok && Solution(root.Right)
+	}
+	return ok
 }

leetcode/901-1000/0965.Univalued-Binary-Tree/Solution_test.go

@@ -10,12 +10,19 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
+		inputs *TreeNode
 		expect bool
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", &TreeNode{
+			Val:   1,
+			Left:  &TreeNode{Val: 1, Left: &TreeNode{Val: 1}, Right: &TreeNode{Val: 1}},
+			Right: &TreeNode{Val: 1, Right: &TreeNode{Val: 1}},
+		}, true},
+		{"TestCase", &TreeNode{
+			Val:   2,
+			Left:  &TreeNode{Val: 2, Left: &TreeNode{Val: 5}, Right: &TreeNode{Val: 2}},
+			Right: &TreeNode{Val: 2},
+		}, false},
 	}
 
 	//	开始测试
@@ -30,10 +37,10 @@ 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() {
 }