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45 lines
1015 B
Python
45 lines
1015 B
Python
#!/usr/bin/python
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# encoding=utf8
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from __future__ import print_function
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# Author: OMKAR PATHAK
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# We can use Python's dictionary for constructing the graph
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class AdjacencyList(object):
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def __init__(self):
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self.List = {}
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def addEdge(self, fromVertex, toVertex):
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# check if vertex is already present
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if fromVertex in self.List.keys():
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self.List[fromVertex].append(toVertex)
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else:
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self.List[fromVertex] = [toVertex]
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def printList(self):
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for i in self.List:
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print((i,'->',' -> '.join([str(j) for j in self.List[i]])))
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if __name__ == '__main__':
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al = AdjacencyList()
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al.addEdge(0, 1)
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al.addEdge(0, 4)
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al.addEdge(4, 1)
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al.addEdge(4, 3)
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al.addEdge(1, 0)
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al.addEdge(1, 4)
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al.addEdge(1, 3)
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al.addEdge(1, 2)
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al.addEdge(2, 3)
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al.addEdge(3, 4)
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al.printList()
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# OUTPUT:
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# 0 -> 1 -> 4
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# 1 -> 0 -> 4 -> 3 -> 2
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# 2 -> 3
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# 3 -> 4
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# 4 -> 1 -> 3
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