class Graph: def __init__(self, vertex): self.vertex = vertex self.graph = [[0] * vertex for i in range(vertex) ] def add_edge(self, u, v): self.graph[u - 1][v - 1] = 1 self.graph[v - 1][u - 1] = 1 def show(self): for i in self.graph: for j in i: print(j, end=' ') print(' ') g = Graph(100) g.add_edge(1,4) g.add_edge(4,2) g.add_edge(4,5) g.add_edge(2,5) g.add_edge(5,3) g.show()