### [leetcode] 208. Implement Trie (Prefix Tree) _ Algorithm Problem Solve for python

1. Problem
208. Implement Trie (Prefix Tree)
A trie (pronounced as “try”) or prefix tree is a tree data structure used to efficiently store and retrieve keys in a dataset of strings. There are various applications of this data structure, such as autocomplete and spellchecker.
Implement the Trie class:
Trie() Initializes the trie object.
...

### [leetcode] 2095. Delete the Middle Node of a Linked List _ Algorithm Problem Solve for python

1. Problem
2095. Delete the Middle Node of a Linked List
You are given the head of a linked list. Delete the middle node, and return the head of the modified linked list.
The middle node of a linked list of size n is the ⌊n / 2⌋th node from the start using 0-based indexing, where ⌊x⌋ denotes the largest integer less than or equal to x.
For n...

### [leetcode] 547. Number of Provinces _ Algorithm Problem Solve for python

1. Problem
547. Number of Provinces
There are n cities. Some of them are connected, while some are not. If city a is connected directly with city b, and city b is connected directly with city c, then city a is connected indirectly with city c.
A province is a group of directly or indirectly connected cities and no other cities outside of the ...

### [leetcode] 17. Letter Combinations of a Phone Number _ Algorithm Problem Solve for python

1. Problem
17. Letter Combinations of a Phone Number
Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. Return the answer in any order.
A mapping of digits to letters (just like on the telephone buttons) is given below. Note that 1 does not map to any letters.
Example...

### [leetcode] 739. Daily Temperatures _ Algorithm Problem Solve for python

1. Problem
739. Daily Temperatures
Given an array of integers temperatures represents the daily temperatures, return an array answer such that answer[i] is the number of days you have to wait after the ith day to get a warmer temperature. If there is no future day for which this is possible, keep answer[i] == 0 instead.
Example 1:
Input: temp...

### [leetcode] 841. Keys and Rooms _ Algorithm Problem Solve for python

1. Problem
841. Keys and Rooms
There are n rooms labeled from 0 to n - 1 and all the rooms are locked except for room 0. Your goal is to visit all the rooms. However, you cannot enter a locked room without having its key.
When you visit a room, you may find a set of distinct keys in it. Each key has a number on it, denoting which room it unlo...

### [leetcode] 933. Number of Recent Calls _ Algorithm Problem Solve for python

1. Problem
933. Number of Recent Calls
You have a RecentCounter class which counts the number of recent requests within a certain time frame.
Implement the RecentCounter class:
RecentCounter() Initializes the counter with zero recent requests.
int ping(int t) Adds a new request at time t, where t represents some time in milliseconds, an...

### [leetcode] 1456. Maximum Number of Vowels in a Substring of Given Length _ Algorithm Problem Solve for python

1. Problem
1456. Maximum Number of Vowels in a Substring of Given Length
Given a string s and an integer k, return the maximum number of vowel letters in any substring of s with length k.
Vowel letters in English are ‘a’, ‘e’, ‘i’, ‘o’, and ‘u’.
Example 1:
Input: s = "abciiidef", k = 3
Output: 3
Explanation: The substring "iii" contains 3 vo...

### [leetcode] 2390. Removing Stars From a String _ Algorithm Problem Solve for python

1. Problem
2390. Removing Stars From a String
You are given a string s, which contains stars *.
In one operation, you can:
Choose a star in s.
Remove the closest non-star character to its left, as well as remove the star itself.
Return the string after all stars have been removed.
Note:
The input will be generated such that the operation i...

### [leetcode] 11. Container With Most Water _ Algorithm Problem Solve for python

1. Problem
11. Container With Most Water
You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, height[i]).
Find two lines that together with the x-axis form a container, such that the container contains the most water.
Return the maximum amount of wa...

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