Repeated DNA Sequences All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for examp…
分类：LeetCode
【leetcode】97. Interleaving String 字符串c是否是字符串a、b的交叉结果
1. 题目 Given s1, s2, s3, find whether s3 is formed by the interleaving of s1 and s2. For example,Given:s1 = …
LeetCode | Scramble String（字符交换）
Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings re…
LeetCode算法题-Maximum Product of Three Numbers（Java实现）
这是悦乐书的第275次更新，第291篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第143题（顺位题号是628）。给定一个整数数组，从其中找出三个数，使得乘积最大。例如： 输入：[1,2,3…
2018-06-30 3. Longest Substring Without Repeating Characters
题意：给你一个字符串，找到里面不包含相同字符的最长子串。 解题思路： 思路一：暴力，（loop1）从第一个字符开始，（loop2）字符数量从1到n，（loop3）判断每个子串是否符合条件。时间复杂度为O(n * n * …
57. Insert Interval
57. Insert Interval 题目 Given a set of non-overlapping intervals, insert a new interval into the intervals (mer…
39. Combination Sum
39. Combination Sum 题目 Given a set of candidate numbers (C) (without duplicates) and a target number (T), find…
[LeetCode] Construct Binary Tree from Preorder and Inorder Traversal 由先序和中序遍历建立二叉树
Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that dup…
[LeetCode] Largest Sum of Averages 最大的平均数之和
We partition a row of numbers A into at most K adjacent (non-empty) groups, then ou…
LeetCode 6. ZigZag Conversion
The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (y…
Leetcode 208. Implement Trie (Prefix Tree)
Implement a trie with insert, search, and startsWith methods. Note: You may assume that all inputs are consist…
LeetCode | Count and Say
题目： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ... 1…
