Path With Minimum Effort made easy: understand LeetCode 1631 with a Dijkstra heap, 4-way moves, and fully commented Python code…
Author: codeanddebug
Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.…
Given two sorted arrays a[] and b[], where each array may contain duplicate elements , the task is to return the elements in the union of the two arrays…
Given an array, arr of n integers, and an integer element x, find whether element x is present in the array. Return the index of…
Given an integer array nums, move all 0’s to the end of it while maintaining the relative order of the non-zero elements.…
Find the shortest clear path from the top-left to bottom-right of a 0-1 grid. We explain the intuition, walk through…
Need not just distances but the real route? Learn how to extend Dijkstra’s algorithm to reconstruct the shortest path from…
See how to run Dijkstra with a set instead of a heap. We break down the idea, walk through clear…
Learn to implement Dijkstras Algorithm with a Priority Queue using a min-heap (heapq). We cover the problem statement, clear intuition,…
Learn how to find single source shortest path in a weighted directed acyclic graph (DAG) in linear time. We explain…