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Important Leetcode Questions

QUESTION DIFFICULTY TOPICS COMPANY TIME Two Sum EASY ARRAY...

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Important Leetcode Questions

QUESTION DIFFICULTY TOPICS COMPANY TIME Two Sum EASY ARRAY...

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Two Sum

Problem: Two Sum 1. Clarify the problem The "Two Sum" problem typically asks you to find two numbers in an array that add up to...

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Merge Two Sorted Lists

Clarify the problem: The problem requires merging two sorted linked lists into a single sorted linked list. We need to return the head of ...

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Best Time to Buy and Sell Stock

Clarify the problem: The problem requires finding the maximum profit that can be achieved by buying and selling a stock. We can only make on...

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Valid Palindrome

Clarify the problem: The problem requires determining whether a given string is a valid palindrome. A palindrome is a string that reads th...

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Invert Binary Tree

Clarify the problem: The problem requires inverting a binary tree. Given the root of a binary tree, we need to swap the left and right chi...

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Valid Anagram

Clarify the problem: The problem requires determining whether two strings are anagrams of each other. An anagram is a word or phrase forme...

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Binary Search

Clarify the problem: The problem requires implementing the binary search algorithm to find a target element in a sorted array. We are give...

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Flood Fill

Clarify the problem: The problem requires implementing a flood fill algorithm to fill a given area with a new color. We are given an image...

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Lowest Common Ancestor of a Binary Search Tree

Clarify the problem: The problem requires finding the lowest common ancestor (LCA) of two nodes in a binary search tree (BST). We need to ...

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Balanced Binary Tree

Clarify the problem: The problem requires determining whether a binary tree is balanced. We need to check if the heights of the left and r...

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Linked List Cycle

Clarify the problem: The problem requires determining whether a linked list contains a cycle. We need to identify if there is a cycle in t...

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Implement Queue using Stacks

Clarify the problem: The problem requires implementing a queue using stacks. We need to implement the functionality of a queue, including ...

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First Bad Version

Clarify the problem: The problem requires finding the first bad version in a series of versions. We need to implement a function that take...

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Ransom Note

Clarify the problem: The problem requires determining if a ransom note can be constructed from a given magazine. We need to implement a fu...

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Climbing Stairs

Clarify the problem: The problem requires finding the number of distinct ways to climb to the top of a staircase with n steps. Each time, ...