#!/usr/bin/env python3

import igraph as ig


def read_graph(graph_file: str = 'valos_halozat_formatted.txt') -> ig.Graph:
    with open(graph_file) as f:
        vertices = int(f.readline())
        edges = int(f.readline())
        result_graph: ig.Graph = ig.Graph(vertices)
        for _ in range(edges):
            line = f.readline().split(' ')
            result_graph.add_edge(int(line[0]), int(line[1]))
    return result_graph


if __name__ == "__main__":
    read_graph()