Merge pull request #1247 from 0xff-dev/966

Add solution and test-cases for problem 966

Author: 6boris

leetcode/901-1000/0966.Vowel-Spellchecker/README.md

@@ -1,28 +1,45 @@
 # [966.Vowel Spellchecker][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
 
+Given a `wordlist`, we want to implement a spellchecker that converts a query word into a correct word.
+
+For a given `quer` word, the spell checker handles two categories of spelling mistakes:
+
+- Capitalization: If the query matches a word in the wordlist (**case-insensitive**), then the query word is returned with the same case as the case in the wordlist.
+
+    - Example: `wordlist = ["yellow"]`, `query = "YellOw"`: `correct = "yellow"`
+    - Example: `wordlist = ["Yellow"]`, `query = "yellow"`: `correct = "Yellow"`
+    - Example: `wordlist = ["yellow"]`, `query = "yellow"`: `correct = "yellow"`
+
+- Vowel Errors: If after replacing the vowels `('a', 'e', 'i', 'o', 'u')` of the query word with any vowel individually, it matches a word in the wordlist (**case-insensitive**), then the query word is returned with the same case as the match in the wordlist.
+
+    - Example: `wordlist = ["YellOw"]`, `query = "yollow"`: `correct = "YellOw"`
+    - Example: `wordlist = ["YellOw"]`, `query = "yeellow"`: `correct = ""` (no match)
+    - Example: `wordlist = ["YellOw"]`, `query = "yllw"`: `correct = ""` (no match)
+
+In addition, the spell checker operates under the following precedence rules:
+
+- When the query exactly matches a word in the wordlist (**case-sensitive**), you should return the same word back.
+- When the query matches a word up to capitlization, you should return the first such match in the wordlist.
+- When the query matches a word up to vowel errors, you should return the first such match in the wordlist.
+- If the query has no matches in the wordlist, you should return the empty string.
+
+Given some `queries`, return a list of words `answer`, where `answer[i]` is the correct word for `query = queries[i]`.
+
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: wordlist = ["KiTe","kite","hare","Hare"], queries = ["kite","Kite","KiTe","Hare","HARE","Hear","hear","keti","keet","keto"]
+Output: ["kite","KiTe","KiTe","Hare","hare","","","KiTe","","KiTe"]
 ```
 
-## 题意
-> ...
+**Example 2:**
 
-## 题解
-
-### 思路1
-> ...
-Vowel Spellchecker
-```go
 ```
-
+Input: wordlist = ["yellow"], queries = ["YellOw"]
+Output: ["yellow"]
+```
 
 ## 结语
 

leetcode/901-1000/0966.Vowel-Spellchecker/Solution.go

@@ -1,5 +1,65 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+import (
+	"fmt"
+	"strings"
+)
+
+func isVowel(b byte) bool {
+	return b == 'a' || b == 'e' || b == 'i' || b == 'o' || b == 'u' ||
+		b == 'A' || b == 'E' || b == 'I' || b == 'O' || b == 'U'
+}
+
+// babee = b1b2
+func toVowel(word string) string {
+	buf := strings.Builder{}
+	c := 0
+	for _, b := range []byte(word) {
+		if !isVowel(b) {
+			buf.WriteByte(b)
+			continue
+		}
+		buf.WriteString(fmt.Sprintf("%d", c))
+		c = 0
+	}
+	if c > 0 {
+		buf.WriteString(fmt.Sprintf("%d", c))
+	}
+
+	return buf.String()
+}
+
+func Solution(wordlist []string, queries []string) []string {
+	m := make(map[string]struct{})
+	lower := make(map[string]string)
+	matched := make(map[string]string)
+	for _, word := range wordlist {
+		m[word] = struct{}{}
+		l := strings.ToLower(word)
+		if _, ok := lower[l]; !ok {
+			lower[l] = word
+		}
+		match := toVowel(l)
+		if _, ok := matched[match]; !ok {
+			matched[match] = word
+		}
+	}
+	ans := make([]string, len(queries))
+	for i, q := range queries {
+		if _, ok := m[q]; ok {
+			ans[i] = q
+			continue
+		}
+		lq := strings.ToLower(q)
+
+		if v, ok := lower[lq]; ok {
+			ans[i] = v
+			continue
+		}
+		if v, ok := matched[toVowel(lq)]; ok {
+			ans[i] = v
+			continue
+		}
+	}
+	return ans
 }

leetcode/901-1000/0966.Vowel-Spellchecker/Solution_test.go

@@ -9,31 +9,30 @@ import (
 func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
-		name   string
-		inputs bool
-		expect bool
+		name              string
+		wordlist, queries []string
+		expect            []string
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", []string{"KiTe", "kite", "hare", "Hare"}, []string{"kite", "Kite", "KiTe", "Hare", "HARE", "Hear", "hear", "keti", "keet", "keto"}, []string{"kite", "KiTe", "KiTe", "Hare", "hare", "", "", "KiTe", "", "KiTe"}},
+		{"TestCase2", []string{"yellow"}, []string{"YellOw"}, []string{"yellow"}},
 	}
 
 	//	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.wordlist, c.queries)
 			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",
+					c.expect, got, c.wordlist, c.queries)
 			}
 		})
 	}
 }
 
-//	压力测试
+// 压力测试
 func BenchmarkSolution(b *testing.B) {
 }
 
-//	使用案列
+// 使用案列
 func ExampleSolution() {
 }