Answered: Please help explain the loop invariant…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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class Solution: def minCostConnectPoints(self, points: List[List[int]]) -> int: # start a visited set and min heap vis = set() min_heap = [(0,points[0])] res = 0 while min_heap: for _ in range(len(min_heap)): # check if point at top of heap is not already visited while tuple(min_heap[0][1]) in vis: heapq.heappop(min_heap) dist, point = heapq.heappop(min_heap) # add distance to the result and add that point to the visited set res += dist vis.add(tuple(point)) # we'll stop when the len of visited set becomes equal to length of all points if len(vis) == len(points): return res for i in range(len(points)): if points[i] == point or tuple(points[i]) in vis: continue # add distance of points in the heap along with the point heapq.heappush(min_heap, (abs(points[i][0] - point[0]) + abs(points[i][1] - point[1]), points[i])) Please help explain the loop invariant for the code above.

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