题目: Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in each of the two partitions. Example Given 1->4->3->2…

[CF932G]Palindrome Partition(回文树,动态规划) 题面 CF 翻译: 给定一个串,把串分为偶数段 假设分为了\(s1,s2,s3....sk\) 求,满足\(s_1=s_k,s_2=s_{k-1}......\)的方案数 题解 反正我是不会做 基本就是照着\(laofu\)的打了一遍(laofu太强啦) 这题分成了两个步骤 如果直接分\(k\)段我们是没法直接判断的 假设两段\(s_i,s_{k-i+1}\) 因为\(s_i=s_{k-i+1}=x_1x_2.....…

[CF932G]Palindrome Partition 题意:给你一个字符串s,问你有多少种方式,可以将s分割成k个子串,设k个子串是$x_1x_2...x_k$,满足$x_1=x_k,x_2=x_{k-1}...x_i=x{k-i+1}$. $|s|\le 10^6$ 题解:设字符串的长度为n,考虑字符串$T=s_1s_ns_2s_{n-1}...$.问题就转化成了:求将原串划分成若干个长度为偶数的回文子串的方案数. 首先我们有一种暴力的想法,设f[i]表示将前i个字符分成若干个回文子串的方…

[CF830C]Bamboo Partition 题解:给你n个数a1,a2...an和k,求最大的d使得$\sum\limits_{i=1}^n((d-a[i] \% d) \% d) \le k$ n<=100,a[i]<=10^9,k<=10^11 题解:$\sum\limits_{i=1}^n((d-a[i] \% d) \% d)=d\sum\limits_{i=1}^n{\lceil {a[i]\over d}\rceil }-\sum\limits_{i=1}^na[i]$…

[LeetCode]86. Partition List 解题报告(Python) 标签(空格分隔): LeetCode 作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.me/ 题目地址:https://leetcode.com/problems/partition-list/description/ 题目描述: Given a linked list and a value x, partition it such that all no…

 二分法:通过O(1)的时间,把规模为n的问题变为n/2.T(n) = T(n/2) + O(1) = O(logn). 基本操作:把长度为n的数组,分成前区间和后区间.设置start和end下标.int start = 0, end = nums.length - 1.循环结束条件为start + 1 < end ,即相邻时结束循环,所以最后需判断start和end中哪个是目标值.指针变化为start = mid,取后半区间:end = mid,取前半区间. 经典二分搜索:1. First p…

题目如下: 解题思路:本题是[leetcode]473. Matchsticks to Square的姊妹篇,唯一的区别是[leetcode]473. Matchsticks to Square指定了分成四个子数组,而本题分成的份数不定,作为参数输入.另外,本题的测试用例好像复杂一点,因此我过滤掉了nums中值等于avg的元素,不参与后面的DFS计算,提高效率. 代码如下: class Solution(object): def canPartitionKSubsets(self, nums,…

原题地址: https://oj.leetcode.com/problems/partition-list/ 题目内容: Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in…

Question: Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in each of the two partitions. For example, Given 1->…

题目: Given a string s, partition s such that every substring of the partition is a palindrome. Return all possible palindrome partitioning of s. Example Given s = "aab", return: [ ["aa","b"], ["a","a","…

题目: The code base version is an integer start from 1 to n. One day, someone committed a bad version in the code case, so it caused this version and the following versions are all failed in the unit tests. Find the first bad version. You can call isBa…

http://blog.itpub.net/10159839/viewspace-254449/ ................................ OVER(PARTITION BY)函数介绍 开窗函数               Oracle从8.1.6开始提供分析函数,分析函数用于计算基于组的某种聚合值,它和聚合函数的不同之处是:对于每个组返回多行,而聚合函数对于每个组只返回一行. 开窗函数指定了分析函数工作的数据窗口大小,这个数据窗口大小可能会随着行的变化而变化,举例如下:…

题目如下: Given an integer array A, you partition the array into (contiguous) subarrays of length at most K.  After partitioning, each subarray has their values changed to become the maximum value of that subarray. Return the largest sum of the given arr…

题目如下: Given an array A of integers, return true if and only if we can partition the array into three non-emptyparts with equal sums. Formally, we can partition the array if we can find indexes i+1 < j with (A[0] + A[1] + ... + A[i] == A[i+1] + A[i+2]…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 日期 题目地址:https://leetcode.com/problems/partition-array-into-three-parts-with-equal-sum/ 题目描述 Given an array A of integers, return true if and only if we can partition the array…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 解题方法 日期 题目地址:https://leetcode.com/problems/partition-labels/description/ 题目描述 A string S of lowercase letters is given. We want to partition this string into as many parts as possible so…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 题目地址: https://leetcode.com/problems/partition-array-into-disjoint-intervals/description/ 题目描述: Given an array A, partition it into two (contiguous) subarrays left and right so that: Every elemen…

作者: 负雪明烛 id: fuxuemingzhu 个人博客: http://fuxuemingzhu.cn/ 目录 题目描述 题目大意 解题方法 回溯法 日期 题目地址:https://leetcode.com/problems/partition-to-k-equal-sum-subsets/description/ 题目描述 Given an array of integers nums and a positive integer k, find whether it's possibl…

问题描述: 实现atoi这个函数,将一个字符串转换为整数.如果没有合法的整数,返回0.如果整数超出了32位整数的范围,返回INT_MAX(2147483647)如果是正整数,或者INT_MIN(-2147483648)如果是负整数. 样例 "10" =>10 "-1" => -1 "123123123123123" => 2147483647 "1.0" => 1 问题分析: 这道题特别恶心,虽然思路很…

问题描述: 比较两个字符串A和B,确定A中是否包含B中所有的字符.字符串A和B中的字符都是 大写字母. 样例 给出 A = "ABCD" B = "ACD",返回 true 给出 A = "ABCD" B = "AABC", 返回 false 注意事项 在 A 中出现的 B 字符串里的字符不需要连续或者有序. 问题分析: 实质上利用的是哈希表的思想.只有大写字母,一共26个,遍历A的时候,往里面压,遍历B的时候,往外边弹,如果…

问题分析: 我们通过遍历两个链表拿到每个位的值,两个值加上前一位进位值(0或者1)模10就是该位的值,除以10就是向高位的进位值(0或者1). 由于两个链表可以不一样长,所以要及时判断,一旦为null,该位的值就要变成0. 有一种情况比较特殊,比如:1->1->1->null, 9->8->8->null,最终结果为0->0->0->1->null,需要保留最高位. 而1->1->1->null, 9->8->7-&…

问题分析: 声明当前指针和上一个指针即可. 问题求解: public class Solution { public ListNode removeElements(ListNode head, int val) { ListNode preListNode = new ListNode(0);// 上一个指针 ListNode nowListNode = head;// 当前指针 ListNode returnListNode = null;// 需要返回的链表 preListNode.nex…

问题分析: 用两个指针分别遍历即可. 问题求解: public class Solution { /** * @param nums1 an integer array * @param nums2 an integer array * @return an integer array */ public int[] intersection(int[] nums1, int[] nums2) { List<Integer> list = new ArrayList<Integer>…

问题分析: 既然返回值没有重复,我们不妨将结果放进set中,然后对两个set进行比较. 问题求解: public class Solution { /** * @param nums1 an integer array * @param nums2 an integer array * @return an integer array */ public int[] intersection(int[] nums1, int[] nums2) { Set<Integer> set1 = new…

http://www.cnblogs.com/yogurtwu/p/9494108.html https://www.cnblogs.com/zhangkaimin/p/6251448.html what ?…

Half and Half 类型题 二分法的精髓在于判断目标值在前半区间还是后半区间,Half and Half类型难点在不能一次判断,可能需要一次以上的判断条件. Maximum Number in Mountain Sequence Given a mountain sequence of n integers which increase firstly and then decrease, find the mountain top. 样例  Given nums = [1, 2, 4,…

题目描述: Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your result is the smallest in lexicographical order among all possible results. Example: Given "b…

题目: Given n x m non-negative integers representing an elevation map 2d where the area of each cell is 1 x 1, compute how much water it is able to trap after raining. Example Given 5*4 matrix [12,13,0,12] [13,4,13,12] [13,8,10,12] [12,13,12,12] [13,13…

题目: Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.   Example Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. 题解: 读题可知,区间[a,b]内容积由边缘最小值决定,Two pointer思想,…

题目: Given an array of integers, how many three numbers can be found in the array, so that we can build an triangle whose three edges length is the three numbers that we find? Example Given array S = [3,4,6,7], return 3. They are: [3,4,6] [3,6,7] [4,6…