LeetCode赛题394----Decode String

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LeetCode赛题394----Decode String

394. Decode String Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer…

[LeetCode] 394. Decode String 解码字符串

Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th…

【LeetCode】394. Decode String 解题报告（Python）

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栈日期题目地址:https://leetcode.com/problems/decode-string/description/ 题目描述 Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the…

Leetcode -- 394. Decode String

Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th…

Python 解LeetCode：394 Decode String

题目描述:按照规定,把字符串解码,具体示例见题目链接思路:使用两个栈分别存储数字和字母注意1: 数字是多位的话,要处理后入数字栈注意2: 出栈时过程中产生的组合后的字符串要继续入字母栈注意3: 记得字母出栈的时候字符要逆序组合成字符串注意4: 不用字符串而用字母栈的原因是字符串的 join 效率会比字符串加法高一些结果: 30 ms, beat 98.02% 缺点:判断是数字那里有点代码不简洁,可以把 j 挪到循环外面的 class Solution(object): def dec…

【leetcode】394. Decode String

题目如下: 解题思路:这种题目和四则运算,去括号的题目很类似.解法也差不多. 代码如下: class Solution(object): def decodeString(self, s): """ :type s: str :rtype: str """ stack = [] for i in s: if i != ']': stack.append(i) continue repeatStr = '' while len(stack) >…

394. Decode String 解码icc字符串3[i2[c]]

［抄题］: Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may ass…

394 Decode String 字符串解码

给定一个经过编码的字符串,返回它解码后的字符串.编码规则为: k[encoded_string],表示其中方括号内部的 encoded_string 正好重复 k 次.注意 k 保证为正整数.你可以认为输入字符串总是有效的:输入字符串中没有额外的空格,且输入的方括号总是符合格式要求的.此外,你可以认为原始数据不包含数字,所有的数字只表示重复的次数 k ,例如不会出现像 3a 或 2[4] 的输入.示例:s = "3[a]2[bc]", 返回 "aaabcbc".s…

394. Decode String

[题目] Total Accepted: 10087 Total Submissions: 25510 Difficulty: Medium Contributors: Admin Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repe…

LeetCode赛题395----Longest Substring with At Least K Repeating Characters

395. Longest Substring with At least K Repeating Characters Find the length of the longest substring T of a given string (consists of lowercase letters only) such that every character in T appears no less than k times. Example 1: Input: s = "aaabb&qu…

LeetCode赛题392---- Is Subsequence

392. Is Subsequence Given a string s and a string t, check if s is subsequence of t. You may assume that there is only lower case English letters in both s and t. t is potentially a very long (length ~= 500,000) string, and s is a short string (<=100…

LeetCode赛题391----Perfect Rectangle

#391. Perfect Rectangle Given N axis-aligned rectangles where N > 0, determine if they all together form an exact cover of a rectangular region. Each rectangle is represented as a bottom-left point and a top-right point. For example, a unit square is…

【leetcode刷题笔记】String to Integer (atoi)

Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases. Notes: It is intended for this problem to be spe…

LC 394. Decode String

问题描述 Given an encoded string, return its decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assum…

LeetCode赛题515----Find Largest Element in Each Row

问题描述 You need to find the largest element in each row of a Binary Tree. Example: Input: 1 / \ 2 3 / \ \ 5 3 9 Output: [1, 3, 9] 算法分析使用两个队列,逐层遍历二叉树的各个节点,每个队列中的节点都是同一层的节点,在遍历一层时,找出该层最大的节点值加入ArrayList中. Java算法实现: /** * Definition for a binary tree node…

LeetCode赛题----Find Left Most Element

问题描述 Given a binary tree, find the left most element in the last row of the tree. Example 1: Input: 2 / \ 1 3 Output: 1 Example 2: Input: 1 / \ 2 3 / / \ 4 5 6 / 7 Output: 7 Note: You may assume the tree is not NULL. 算法分析: 逐层遍历二叉树是很经典的算法,常规的逐层遍历二叉树是使…

LeetCode赛题393----UTF-8 Validation

393. UTF-8 Validation A character in UTF8 can be from 1 to 4 bytes long, subjected to the following rules: For 1-byte character, the first bit is a 0, followed by its unicode code. For n-bytes character, the first n-bits are all one's, the n+1 bit is…

LeetCode赛题390----Elimination Game

# 390. Elimination Game There is a list of sorted integers from 1 to n. Starting from left to right, remove the first number and every other number afterward until you reach the end of the list. Repeat the previous step again, but this time from righ…

LeetCode 394. 字符串解码(Decode String) 44

394. 字符串解码 394. Decode String 题目描述给定一个经过编码的字符串,返回它解码后的字符串. 编码规则为: k[encoded_string],表示其中方括号内部的 encoded_string 正好重复 k 次.注意 k 保证为正整数. 你可以认为输入字符串总是有效的,输入字符串中没有额外的空格且输入的方括号总是符合格式要求的. 此外,你可以认为原始数据不包含数字,所有的数字只表示重复的次数 k,例如不会出现像 3a 或 2[4] 的输入. 每日一算法2019/6/1…

leetcode中等题

# Title Solution Acceptance Difficulty Frequency 1 Two Sum 44.5% Easy 2 Add Two Numbers 31.7% Medium 3 Longest Substring Without Repeating Characters 28.8% Medium 4 Median of Two Sorted Arrays 27.2% Hard 5…

Leetcode简单题

# Title Solution Acceptance Difficulty Frequency 1 Two Sum 44.5% Easy 2 Add Two Numbers 31.7% Medium 3 Longest Substring Without Repeating Characters 28.8% Medium 4 Median of Two Sorted Arrays 27.2% Hard 5…

[LeetCode] Decode String 解码字符串

Given an encoded string, return it's decoded string. The encoding rule is: k[encoded_string], where the encoded_string inside the square brackets is being repeated exactly k times. Note that k is guaranteed to be a positive integer. You may assume th…