leetcode

leetcode 692. Top K Frequent Words（python）见详细解题过程

leetcode 1753. Maximum Score From Removing Stones （python）

leetcode 1431. Kids With the Greatest Number of Candies（python）

leetcode 1672. Richest Customer Wealth（python）见详细阶梯过程

leetcode 1588. Sum of All Odd Length Subarrays （python）

leetcode 1572. Matrix Diagonal Sum（python）见详细解题过程

leetcode 1464. Maximum Product of Two Elements in an Array（python）

In English, we have a concept called root, which can be followed by some other word to form another longer word - let's call this word succ…

Given a non-empty array of integers, return the k most frequent elements. You may assume k is always valid, 1 ≤ k ≤ number of unique elemen…

Given a string, sort it in decreasing order based on the frequency of characters. 根据题意，只需要使用内置的函数 Counter 来统计字符串中的字符及其出现频率，然后按照频率从大到小在遍历字符串…

Given two positive integers x and y, an integer is powerful if it is equal to x^i + y^j for some integers i >= 0 and j >= 0. Return a list …

TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL s…

Given a m * n matrix mat of ones (representing soldiers) and zeros (representing civilians), return the indexes of the k weakest rows in th…

You are given a sorted array consisting of only integers where every element appears exactly twice, except for one element which appears ex…

Winter is coming! During the contest, your first job is to design a standard heater with a fixed warm radius to warm all the houses. Every …

Given an array of integers with possible duplicates, randomly output the index of a given target number. You can assume that the given targ…

Given a singly linked list, return a random node's value from the linked list. Each node must have the same probability of being chosen. 根据…

In English, we have a concept called root, which can be followed by some other word to form another longer word - let's call this word succ…

Given a List of words, return the words that can be typed using letters of alphabet on only one row's of American keyboard like the image b…

Given a non-empty array of integers nums, every element appears twice except for one. Find that single one. Each element in the array appea…