Merge pull request #1084 from 0xff-dev/1745

Add solution and test-cases for problem 1745

leetcode/1701-1800/1745.Palindrome-Partitioning-IV/README.md

@@ -1,28 +1,25 @@
 # [1745.Palindrome Partitioning IV][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 string `s`, return `true` if it is possible to split the string `s` into three **non-empty** palindromic substrings. Otherwise, return `false`.
+
+A string is said to be palindrome if it the same string when reversed.
 
 **Example 1:**
 
 ```
-Input: a = "11", b = "1"
-Output: "100"
+Input: s = "abcbdd"
+Output: true
+Explanation: "abcbdd" = "a" + "bcb" + "dd", and all three substrings are palindromes.
 ```
 
-## 题意
-> ...
-
-## 题解
+**Example 2:**
 
-### 思路1
-> ...
-Palindrome Partitioning IV
-```go
 ```
-
+Input: s = "bcbddxy"
+Output: false
+Explanation: s cannot be split into 3 palindromes.
+```
 
 ## 结语
 

leetcode/1701-1800/1745.Palindrome-Partitioning-IV/Solution.go

@@ -1,5 +1,54 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func isPalindrome(s string) bool {
+	l, r := 0, len(s)-1
+	for ; l < r; l, r = l+1, r-1 {
+		if s[l] != s[r] {
+			return false
+		}
+	}
+	return true
+}
+
+func Solution(s string) bool {
+	l := len(s)
+	if l == 3 {
+		return true
+	}
+	left := make([]bool, l)
+	left[0] = true
+	for i := 1; i < l; i++ {
+		left[i] = isPalindrome(s[:i+1])
+	}
+	right := make([]bool, l)
+	right[l-1] = true
+	for i := l - 2; i >= 0; i-- {
+		right[i] = isPalindrome(s[i:])
+	}
+
+	for i := 1; i < l-1; i++ {
+		for ll, r := i-1, i+1; ll >= 0 && r <= l-1; ll, r = ll-1, r+1 {
+			if left[ll] && right[r] {
+				return true
+			}
+			if s[ll] != s[r] {
+				break
+			}
+		}
+	}
+	for i := 1; i < l-2; i++ {
+		if s[i] != s[i+1] {
+			continue
+		}
+
+		for ll, r := i-1, i+2; ll >= 0 && r <= l-1; ll, r = ll-1, r+1 {
+			if left[ll] && right[r] {
+				return true
+			}
+			if s[ll] != s[r] {
+				break
+			}
+		}
+	}
+	return false
 }

leetcode/1701-1800/1745.Palindrome-Partitioning-IV/Solution_test.go

@@ -10,12 +10,11 @@ func TestSolution(t *testing.T) {
 	//	测试用例
 	cases := []struct {
 		name   string
-		inputs bool
+		inputs string
 		expect bool
 	}{
-		{"TestCase", true, true},
-		{"TestCase", true, true},
-		{"TestCase", false, false},
+		{"TestCase1", "abcbdd", true},
+		{"TestCase2", "bcbddxy", false},
 	}
 
 	//	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() {
 }