随笔列表第6页 - PJCK

2019年4月16日

(BFS 二叉树) leetcode 515. Find Largest Value in Each Tree Row

摘要： You need to find the largest value in each row of a binary tree. Example: 阅读全文

posted @ 2019-04-16 12:48 PJCK 阅读(100) 评论(0) 推荐(0) 编辑

(二叉树 BFS) leetcode513. Find Bottom Left Tree Value

摘要： Given a binary tree, find the leftmost value in the last row of the tree. Example 1: Example 2: Note: You may assume the tree (i.e., the given root no 阅读全文

posted @ 2019-04-16 12:28 PJCK 阅读(107) 评论(0) 推荐(0) 编辑

(二叉树 BFS DFS) leetcode 104. Maximum Depth of Binary Tree

摘要： Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest l 阅读全文

posted @ 2019-04-16 09:24 PJCK 阅读(121) 评论(0) 推荐(0) 编辑

(二叉树 BFS DFS) leetcode 111. Minimum Depth of Binary Tree

摘要： Given a binary tree, find its minimum depth. The minimum depth is the number of nodes along the shortest path from the root node down to the nearest l 阅读全文

posted @ 2019-04-16 09:20 PJCK 阅读(130) 评论(0) 推荐(0) 编辑

2019年4月15日

(BFS) leetcode 690. Employee Importance

摘要： 690. Employee Importance Easy 377369FavoriteShare 690. Employee Importance Easy 377369FavoriteShare Easy You are given a data structure of employee in 阅读全文

posted @ 2019-04-15 20:33 PJCK 阅读(123) 评论(0) 推荐(0) 编辑

(BFS/DFS) leetcode 200. Number of Islands

摘要： Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adjacen 阅读全文

posted @ 2019-04-15 19:47 PJCK 阅读(144) 评论(0) 推荐(0) 编辑

(最长回文子串线性DP) 51nod 1088 最长回文子串

摘要：输入一个字符串Str，输出Str里最长回文子串的长度。回文串：指aba、abba、cccbccc、aaaa这种左右对称的字符串。串的子串：一个串的子串指此（字符）串中连续的一部分字符构成的子（字符）串例如 abc 这个串的子串：空串、a、b、c、ab、ac、bc、abc 收起输入一个字符串St 阅读全文

posted @ 2019-04-15 17:58 PJCK 阅读(179) 评论(0) 推荐(0) 编辑

2019年4月14日

(链表 importance) leetcode 2. Add Two Numbers

摘要： You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai 阅读全文

posted @ 2019-04-14 13:07 PJCK 阅读(96) 评论(0) 推荐(0) 编辑

(链表 set) leetcode 817. Linked List Components

摘要： We are given head, the head node of a linked list containing unique integer values. We are also given the list G, a subset of the values in the linked 阅读全文

posted @ 2019-04-14 12:47 PJCK 阅读(137) 评论(0) 推荐(0) 编辑

(链表双指针) leetcode 142. Linked List Cycle II

摘要： Given a linked list, return the node where the cycle begins. If there is no cycle, return null. To represent a cycle in the given linked list, we use 阅读全文

posted @ 2019-04-14 11:22 PJCK 阅读(183) 评论(0) 推荐(0) 编辑

(链表双指针) leetcode 19. Remove Nth Node From End of List

摘要： Given a linked list, remove the n-th node from the end of list and return its head. Example: Note: Given n will always be valid. Follow up: Could you 阅读全文

posted @ 2019-04-14 11:17 PJCK 阅读(180) 评论(0) 推荐(0) 编辑

(链表递归) leetcode 24. Swap Nodes in Pairs

摘要： Given a linked list, swap every two adjacent nodes and return its head. You may not modify the values in the list's nodes, only nodes itself may be ch 阅读全文

posted @ 2019-04-14 10:29 PJCK 阅读(243) 评论(0) 推荐(0) 编辑

(链表) leetcode 328. Odd Even Linked List

摘要： Given a singly linked list, group all odd nodes together followed by the even nodes. Please note here we are talking about the node number and not the 阅读全文

posted @ 2019-04-14 09:59 PJCK 阅读(106) 评论(0) 推荐(0) 编辑

(链表双指针) leetcode 160. Intersection of Two Linked Lists

摘要： Write a program to find the node at which the intersection of two singly linked lists begins. For example, the following two linked lists: begin to in 阅读全文

posted @ 2019-04-14 09:53 PJCK 阅读(133) 评论(0) 推荐(0) 编辑

(链表双指针) leetcode 141. Linked List Cycle

摘要： Given a linked list, determine if it has a cycle in it. To represent a cycle in the given linked list, we use an integer pos which represents the posi 阅读全文

posted @ 2019-04-14 09:44 PJCK 阅读(73) 评论(0) 推荐(0) 编辑