Merge pull request #1083 from 0xff-dev/132

Add solution and test-cases for problem 132

Author: 6boris

leetcode/101-200/0132.Palindrome-Partitioning-II/README.md

@@ -0,0 +1,35 @@
+# [132.Palindrome Partitioning II][title]
+
+## Description
+Given a string `s`, partition `s` such that every `substring` of the partition is a `palindrome`.
+
+Return the **minimum** cuts needed for a palindrome partitioning of `s`.
+
+**Example 1:**
+
+```
+Input: s = "aab"
+Output: 1
+Explanation: The palindrome partitioning ["aa","b"] could be produced using 1 cut.
+```
+
+**Example 2:**
+
+```
+Input: s = "a"
+Output: 0
+```
+
+**Example 3:**
+
+```
+Input: s = "ab"
+Output: 1
+```
+
+## 结语
+
+如果你同我一样热爱数据结构、算法、LeetCode，可以关注我 GitHub 上的 LeetCode 题解：[awesome-golang-algorithm][me]
+
+[title]: https://leetcode.com/problems/palindrome-partitioning-ii/
+[me]: https://github.com/kylesliu/awesome-golang-algorithm

leetcode/101-200/0132.Palindrome-Partitioning-II/Solution.go

@@ -1,5 +1,43 @@
 package Solution
 
-func Solution(x bool) bool {
-	return x
+func Solution(s string) int {
+	cache := map[string]int{}
+	var (
+		dfs          func(string) int
+		isPalindrome func(string) bool
+	)
+	isPalindrome = func(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
+	}
+	dfs = func(cur string) int {
+		l := len(cur)
+		if l == 0 || l == 1 {
+			return 0
+		}
+		if v, ok := cache[cur]; ok {
+			return v
+		}
+		if isPalindrome(cur) {
+			cache[cur] = 0
+			return 0
+		}
+		m := -1
+		for end := 1; end < len(cur); end++ {
+			if isPalindrome(cur[:end]) {
+				r := dfs(cur[end:]) + 1
+				if m == -1 || m > r {
+					m = r
+				}
+			}
+		}
+		cache[cur] = m
+		return m
+	}
+	return dfs(s)
 }

leetcode/101-200/0132.Palindrome-Partitioning-II/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", "aab", 1},
+		{"TestCase2", "a", 0},
+		{"TestCase3", "ab", 1},
 	}
 
 	//	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() {
 }