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What is Topological Sort? The topological sort is an ordering of nodes such that every node appears before all the nodes it points to. The canonical application of the algorism is dependency resolution. Coding problem using Topological Sort class Solution: def findOrder(self, numCourses: int, prerequisites: List[List[int]]) -> List[int]: graph = defaultdict(list) for crs, prereq in prerequisites: graph[crs].append(prereq) visited, cycle = set(), set() def dfs(crs): # if there is a cycle, return ...