LeetCode OJ Palindrome Partitioning II
来源:互联网 发布:java 多租户 编辑:程序博客网 时间:2024/06/16 19:43
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.
For example, given s = "aab"
,
Return 1
since the palindrome partitioning ["aa","b"]
could be produced using 1 cut.
还想按照上一题的dfs解法来解,结果超时了,后来在discuss里面看到了更好地解法,用dp:
https://oj.leetcode.com/discuss/6691/my-dp-solution-explanation-and-code
直接摘录了:
Calculate and maintain 2 DP states:
pal[i][j] , which is whether s[i..j] forms a pal
d[i], which is the minCut for s[i..n-1]
Once we comes to a pal[i][j]==true:
- if j==n-1, the string s[i..n-1] is a Pal, minCut is 0, d[i]=0;
- else: the current cut num (first cut s[i..j] and then cut the rest s[j+1...n-1]) is 1+d[j+1], compare it to the exisiting minCut num d[i], repalce if smaller.
d[0] is the answer.
代码也是照抄,罪过:
class Solution {public: int minCut(string s) { if(s.empty()) return 0; int n = s.size(); vector<vector<bool>> pal(n,vector<bool>(n,false)); vector<int> d(n); for(int i=n-1;i>=0;i--) { d[i]=n-i-1; // initialize the d[i] as its max(to a n-length string, the max cut is n - 1) for(int j=i;j<n;j++) { if(s[i]==s[j] && (j-i<2 || pal[i+1][j-1])) // if a palindrome's two sides are the same of its length is zero { pal[i][j]=true; if(j==n-1) d[i]=0; else if(d[j+1]+1<d[i]) d[i]=d[j+1]+1; } } } return d[0]; }};
0 0
- LeetCode OJ:Palindrome Partitioning II
- LeetCode OJ - Palindrome Partitioning II
- LeetCode OJ Palindrome Partitioning II
- LeetCode OJ:Palindrome Partitioning
- LeetCode OJ Palindrome Partitioning
- LeetCode : Palindrome Partitioning II
- [leetcode] Palindrome Partitioning II
- leetcode:Palindrome Partitioning II
- 【leetcode】Palindrome Partitioning II
- leetcode - Palindrome Partitioning II
- [LeetCode]Palindrome Partitioning II
- [Leetcode]Palindrome Partitioning II
- [leetcode]Palindrome Partitioning II
- leetcode Palindrome Partitioning II
- LeetCode-Palindrome Partitioning II
- [leetcode] Palindrome Partitioning II
- LeetCode - Palindrome Partitioning II
- [Leetcode]Palindrome Partitioning II
- 学习数据库笔记七
- LeetCode OJ Valid Palindrome
- 一次搞懂java变量的修饰及属性
- 第2周项目4——图书馆的书
- find 命令
- LeetCode OJ Palindrome Partitioning II
- 栋栋晓08:Bootstrap学习总结:栅格系统
- 我对linux理解之v4l2
- Apache下配置虚拟主机总结
- 简述一下二级指针以及指针的引用在结构体中用法
- 黑马程序员 OC中的单例设计模式
- LeetCode OJ Clone Graph
- 虚拟主机
- LeetCode OJ Populating Next Right Pointers in Each Node II