Stack vs queue topo sort8/18/2023 ![]() ![]() visited = True # Check if there is an outgoing edge for a node in the adjacency list if src in self. # The default dictionary would create an empty list as a default (value) # for the nonexistent keys.ĭef AddEdge(self, src : int, dst : int) : 500 - Internal Server Error at 10:24 Sure, it's either topological sorting OR DFS in reversal of G and considering vertices in postorder. ‘V’ is the number of vertices and ‘E’ is the number of edges in a graph.įrom collections import deque, defaultdict 588 4 16 FWIW, I don't see in this excerpt where it explicitly says that you must do a topological sort first. Time complexity of topological sort : O ( V + E ) for an adjacency list implementation of a graph.
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