Add solution and test-cases for problem 2368

leetcode/2301-2400/2368.Reachable-Nodes-With-Restrictions/README.md

@@ -1,28 +1,35 @@
 # [2368.Reachable Nodes With Restrictions][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
+There is an undirected tree with `n` nodes labeled from `0` to `n - 1` and `n - 1` edges.
+
+You are given a 2D integer array `edges` of length `n - 1` where `edges[i] = [ai, bi]` indicates that there is an edge between nodes `ai` and `bi` in the tree. You are also given an integer array `restricted` which represents **restricted** nodes.
+
+Return the **maximum** number of nodes you can reach from node 0 without visiting a restricted node.
+
+Note that node `0` will **not** be a restricted node.
 
-**Example 1:**
+**Example 1:**  
+
+![1](./1.png)
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: n = 7, edges = [[0,1],[1,2],[3,1],[4,0],[0,5],[5,6]], restricted = [4,5]
+Output: 4
+Explanation: The diagram above shows the tree.
+We have that [0,1,2,3] are the only nodes that can be reached from node 0 without visiting a restricted node.
 ```
 
-## 题意
-> ...
+**Example 2:**  
 
-## 题解
+![2](./2.png)
 
-### 思路1
-> ...
-Reachable Nodes With Restrictions
-```go
 ```
-
+Input: n = 7, edges = [[0,1],[0,2],[0,5],[0,4],[3,2],[6,5]], restricted = [4,2,1]
+Output: 3
+Explanation: The diagram above shows the tree.
+We have that [0,5,6] are the only nodes that can be reached from node 0 without visiting a restricted node.
+```
 
 ## 结语
 

leetcode/2301-2400/2368.Reachable-Nodes-With-Restrictions/Solution.go

@@ -1,5 +1,35 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(n int, edges [][]int, restricted []int) int {
+	restrictedMap := make(map[int]struct{})
+	for _, n := range restricted {
+		restrictedMap[n] = struct{}{}
+	}
+	adj := make([][]int, n)
+	for _, e := range edges {
+		adj[e[0]] = append(adj[e[0]], e[1])
+		adj[e[1]] = append(adj[e[1]], e[0])
+	}
+	ans := 0
+	q := []int{0}
+	v := make([]bool, n)
+	v[0] = true
+	for len(q) > 0 {
+		nq := make([]int, 0)
+		ans += len(q)
+		for _, cur := range q {
+			for _, next := range adj[cur] {
+				if v[next] {
+					continue
+				}
+				if _, ok := restrictedMap[next]; ok {
+					continue
+				}
+				nq = append(nq, next)
+				v[next] = true
+			}
+		}
+		q = nq
+	}
+	return ans
 }

leetcode/2301-2400/2368.Reachable-Nodes-With-Restrictions/Solution_test.go

@@ -9,31 +9,32 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name       string
+		n          int
+		edges      [][]int
+		restricted []int
+		expect     int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", 7, [][]int{{0, 1}, {1, 2}, {3, 1}, {4, 0}, {0, 5}, {5, 6}}, []int{4, 5}, 4},
+		{"TestCase", 7, [][]int{{0, 1}, {0, 2}, {0, 5}, {0, 4}, {3, 2}, {6, 5}}, []int{4, 2, 1}, 3},
 	}
 
 	//	开始测试
 	for i, c := range cases {
 		t.Run(c.name+" "+strconv.Itoa(i), func(t *testing.T) {
-			got := Solution(c.inputs)
+			got := Solution(c.n, c.edges, c.restricted)
 			if !reflect.DeepEqual(got, c.expect) {
-				t.Fatalf("expected: %v, but got: %v, with inputs: %v",
-					c.expect, got, c.inputs)
+				t.Fatalf("expected: %v, but got: %v, with inputs: %v %v %v",
+					c.expect, got, c.n, c.edges, c.restricted)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }