https://hiteshbuilds.com/tags/interview-prep/Recent content in Interview-Prep on Hitesh PatelHugo -- 0.155.3en-usTue, 17 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/valid-palindrome/Tue, 17 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/valid-palindrome/Explanation with intuitions of how to check if a string is a palindrome by ignoring non-alphanumeric characters with two-pointer approach.https://hiteshbuilds.com/blind-75/valid-parentheses/Mon, 16 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/valid-parentheses/Step by step explanation of how to validate bracket sequences using a stack, with dry run and C++ codehttps://hiteshbuilds.com/blind-75/group-anagrams/Fri, 13 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/group-anagrams/Step by step explanation of how to group anagrams together using sorting and hashmaps, with brute force and optimized solutionshttps://hiteshbuilds.com/blind-75/valid-anagram/Thu, 12 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/valid-anagram/Step by step explanation with how we found two string are anagrams or not with optimizationhttps://hiteshbuilds.com/blind-75/minimum-window-substring/Wed, 11 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/minimum-window-substring/Step by step explanation with how we reach the solution of how to find the minimum window substring using Brute Force and Sliding Windowhttps://hiteshbuilds.com/blind-75/longest-repeating-character-replacement/Tue, 10 Mar 2026 12:12:00 +0530https://hiteshbuilds.com/blind-75/longest-repeating-character-replacement/Step by step explanation of how to find the longest repeating character replacement using Brute Force and Sliding Window using hashtablehttps://hiteshbuilds.com/blind-75/longest-substring-without-repeating-characters/Mon, 09 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/longest-substring-without-repeating-characters/Step by step explanation of how to find the longest substring without repeating characters using Brute Force and Sliding Window, including optimization techniques.https://hiteshbuilds.com/blind-75/remove-nth-node-from-end-of-list/Fri, 06 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/remove-nth-node-from-end-of-list/Learn how to remove the Nth node from the end of a linked list in a single pass using the two-pointer (Tortoise and Hare) technique.https://hiteshbuilds.com/blind-75/merge-two-sorted-list/Wed, 04 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/merge-two-sorted-list/Step-by-step guide to merge two sorted linked lists efficiently. Compare nodes one by one, handle edge cases, and build a single sorted list.https://hiteshbuilds.com/blind-75/linked-list-cycle/Mon, 02 Mar 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/linked-list-cycle/Explanation how to efficiently detect a cycle in a linked list using Floyd’s Cycle Detection algorithm.https://hiteshbuilds.com/blind-75/reverse-linked-list/Sat, 28 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/reverse-linked-list/Detailed guide to reversing a linked list using the three-pointer approach, both recursively and iteratively.https://hiteshbuilds.com/blind-75/word-search/Thu, 26 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/word-search/Step by step explanation of how to find a given word in a grid using DFS and backtracking, including optimization techniques.https://hiteshbuilds.com/blind-75/rotate-image/Tue, 24 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/rotate-image/How to rotate a matrix 90 degrees clockwise in-place using transpose and reverse. without using extra spacehttps://hiteshbuilds.com/blind-75/spiral-matrix/Sun, 22 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/spiral-matrix/Explanation of how to traverse a matrix in spiral order with a clean and efficient approach.https://hiteshbuilds.com/blind-75/set-matrix-zeroes/Fri, 20 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/set-matrix-zeroes/If an matrix element contains zero we need to set its entire row and column to zero without using any extra spacehttps://hiteshbuilds.com/blind-75/container-most-water/Tue, 17 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/container-most-water/Step by step thought process for how to find the two lines such that they contain most water using two pointer approachhttps://hiteshbuilds.com/blind-75/three-sum/Sun, 15 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/three-sum/A complete breakdown of finding unique triplets that sum to zero — from the brute force approach to reducing Three Sum into a Two Sum problem for an optimal O(n²) solution.https://hiteshbuilds.com/blind-75/search-in-rotated-sorted-array/Fri, 13 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/search-in-rotated-sorted-array/A complete breakdown of searching an element from an rotated sorted array. Starting from brute force to using binary search for optimal solution.https://hiteshbuilds.com/blind-75/find-minimum-in-rotated-sorted-array/Wed, 11 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/find-minimum-in-rotated-sorted-array/A complete breakdown of finding the minimum element from an roated sorted array from Blind 75 List. Starting from brute force to using binary search for optimal solution.https://hiteshbuilds.com/blind-75/best-time-to-buy-and-sell-stock/Fri, 06 Feb 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/best-time-to-buy-and-sell-stock/A complete breakdown of the Best Time to Buy and Sell Stock problem from the Blind 75 list, starting with brute force, analyzing failed approaches, and arriving at the optimal one-pass solution.https://hiteshbuilds.com/blind-75/two-sum/Mon, 26 Jan 2026 00:00:00 +0530https://hiteshbuilds.com/blind-75/two-sum/A step-by-step breakdown of how I approached the Two Sum problem in the Blind 75 list, starting from brute force, rejecting incorrect optimizations, and arriving at the optimal hash map solution.