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Apr 07

Pairs of songs with total durations divisible by 60 | Leetcode #1010

Tech DoseLeave a commentData Structuresleetcode 1010, leetcode medium, leetcode solution, Pairs of songs with total durations divisible by 60

This video explains a very important mathematical logic problem which applies the concept of remainder. I have explained how to find pairs of songs with total durations divisible by 60 starting from the brute force approach. I have also given Read full

Mar 25

Trapping Rainwater Problem | Leetcode #42

Tech DoseLeave a commentData Structuresleetcode 42, leetcode hard, trapping rainwater, trapping rainwater problem

This video explains a very important programming interview problem which is the trapping rainwater problem.In this problem, given an array representing elevation map, we are required to find the amount of water the elevation map can trap.I have explained all Read full

Mar 17

4 Sum Problem | Leetcode #18

Tech DoseLeave a commentData Structures

This video explains a very important programming interview problem which is the 4 sum problem.This problem can be solved using multiple techniques and algorithms.I have explained all the approaches using simple examples.I have explained 3 techniques.The first one is just Read full

Feb 28

Chaining in Hashmap | Collision Resolution Technique

Tech DoseLeave a commentData Structureschaining, collision resolution in hashmap, hashmap, map

This video explains the chaining collision resolution technique in hashmap.Chaining allows to keep the elements with same hash value using a linked list.I have explained everything related to chaining in details using examples. I have also explained the method to Read full

Feb 26

How to Sort a very large file | External Sorting technique

Tech DoseLeave a commentData Structuresexternal merge sort, external sorting, merge k sorted lists, sort large file

This video explains a very important interview question which is to sort a very large file which cannot fit in the main memory.We can only apply sorting algorithm to the data in main memory because accessing and doing operations on Read full

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Placement Preparation Plan

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Recent Posts

  • Pairs of songs with total durations divisible by 60 | Leetcode #1010 April 7, 2021
  • Trapping Rainwater Problem | Leetcode #42 March 25, 2021
  • 4 Sum Problem | Leetcode #18 March 17, 2021
  • Chaining in Hashmap | Collision Resolution Technique February 28, 2021
  • How to Sort a very large file | External Sorting technique February 26, 2021
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