Merge pull request #1093 from 0xff-dev/3223

Add solution and test-cases for problem 3223

Author: 6boris

leetcode/3201-3300/3223.Minimum-Length-of-String-After-Operations/README.md

@@ -1,28 +1,40 @@
 # [3223.Minimum Length of String After Operations][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
+You are given a string `s`.
+
+You can perform the following process on `s` **any** number of times:
+
+- Choose an index `i` in the string such that there is **at least** one character to the left of index `i` that is equal to `s[i]`, and **at least** one character to the right that is also equal to `s[i]`.
+- Delete the **closest** character to the **left** of index `i` that is equal to `s[i]`.
+- Delete the **closest** character to the **right** of index `i` that is equal to `s[i]`.
+
+Return the **minimum** length of the final string `s` that you can achieve.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
-```
+Input: s = "abaacbcbb"
 
-## 题意
-> ...
+Output: 5
 
-## 题解
+Explanation:
+We do the following operations:
 
-### 思路1
-> ...
-Minimum Length of String After Operations
-```go
+Choose index 2, then remove the characters at indices 0 and 3. The resulting string is s = "bacbcbb".
+Choose index 3, then remove the characters at indices 0 and 5. The resulting string is s = "acbcb".
 ```
 
+**Example 2:**
+
+```
+Input: s = "aa"
+
+Output: 2
+
+Explanation:
+We cannot perform any operations, so we return the length of the original string.
+```
 
 ## 结语
 

leetcode/3201-3300/3223.Minimum-Length-of-String-After-Operations/Solution.go

@@ -1,5 +1,19 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(s string) int {
+	count := [26]int{}
+	for _, b := range s {
+		count[b-'a']++
+	}
+	ans := 0
+	for i := range 26 {
+		if count[i] != 0 {
+			if count[i]&1 == 1 {
+				ans++
+				continue
+			}
+			ans += 2
+		}
+	}
+	return ans
 }

leetcode/3201-3300/3223.Minimum-Length-of-String-After-Operations/Solution_test.go

@@ -10,12 +10,11 @@ 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", "abaacbcbb", 5},
+		{"TestCase2", "aa", 2},
 	}
 
 	//	开始测试
@@ -30,10 +29,10 @@ 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() {
 }