Add solution and test-cases for problem 1839

leetcode/1801-1900/1839.Longest-Substring-Of-All-Vowels-in-Order/README.md

@@ -1,28 +1,40 @@
 # [1839.Longest Substring Of All Vowels in Order][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 string is considered **beautiful** if it satisfies the following conditions:
+
+- Each of the 5 English vowels (`'a'`, `'e'`, `'i'`, `'o'`, `'u'`) must appear **at least once** in it.
+- The letters must be sorted in **alphabetical order** (i.e. all `'a'`s before `'e'`s, all `'e'`s before `'i'`s, etc.).
+
+For example, strings `"aeiou"` and `"aaaaaaeiiiioou"` are considered **beautiful**, but `"uaeio"`, `"aeoiu"`, and `"aaaeeeooo"` are **not beautiful**.
+
+Given a string `word` consisting of English vowels, return the **length of the longest beautiful substring** of `word`. If no such substring exists, return `0`.
+
+A **substring** is a contiguous sequence of characters in a string.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: word = "aeiaaioaaaaeiiiiouuuooaauuaeiu"
+Output: 13
+Explanation: The longest beautiful substring in word is "aaaaeiiiiouuu" of length 13.
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Longest Substring Of All Vowels in Order
-```go
 ```
+Input: word = "aeeeiiiioooauuuaeiou"
+Output: 5
+Explanation: The longest beautiful substring in word is "aeiou" of length 5.
+```
+
+**Example 3:**
 
+```
+Input: word = "a"
+Output: 0
+Explanation: There is no beautiful substring, so return 0.
+```
 
 ## 结语
 

leetcode/1801-1900/1839.Longest-Substring-Of-All-Vowels-in-Order/Solution.go

@@ -1,5 +1,31 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+type charCount struct {
+	char  byte
+	count int
+}
+
+func Solution(word string) int {
+
+	pre := byte(' ')
+	// a, e, i, o, u
+	group := make([]charCount, 0)
+	index := -1
+	for _, b := range []byte(word) {
+		if b != pre {
+			group = append(group, charCount{b, 1})
+			index++
+			pre = b
+			continue
+		}
+		group[index].count++
+	}
+	ret := 0
+	// 1,2,3,4,5
+	for i := 0; i <= len(group)-5; i++ {
+		if group[i].char == 'a' && group[i+1].char == 'e' && group[i+2].char == 'i' && group[i+3].char == 'o' && group[i+4].char == 'u' {
+			ret = max(ret, group[i].count+group[i+1].count+group[i+2].count+group[i+3].count+group[i+4].count)
+		}
+	}
+	return ret
 }

leetcode/1801-1900/1839.Longest-Substring-Of-All-Vowels-in-Order/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 string
+		expect int
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", "aeiaaioaaaaeiiiiouuuooaauuaeiu", 13},
+		{"TestCase2", "aeeeiiiioooauuuaeiou", 5},
+		{"TestCase3", "a", 0},
 	}
 
 	//	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() {
 }