Leetcode Problem 2473. Minimum Cost to Buy Apples

2473. Minimum Cost to Buy Apples

Leetcode Solutions

Dijkstra's Algorithm for Shortest Path

  1. Initialize a graph as an adjacency list to represent the bidirectional roads.
  2. For each city, run Dijkstra's algorithm to find the shortest path to all other cities.
  3. Initialize an answer array to store the minimum total cost for each city.
  4. For each city as the starting point: a. Use a priority queue to store and retrieve the next city with the minimum distance. b. Keep track of the distances in a distance array, initialized to infinity for all cities except the starting city, which is zero. c. Update the answer for the starting city with the cost of buying an apple from the current city plus the cost of returning to the starting city multiplied by k. d. Update the distance array and priority queue for neighboring cities if a shorter path is found.
  5. Return the answer array containing the minimum total cost for each starting city.
UML Thumbnail

Breadth-First Search (BFS) with Priority Queue

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