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Duplicate from jessezhaoxizhang/RepoZero-Py2JS
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import argparse
import networkx as nx
parser = argparse.ArgumentParser()
parser.add_argument('--a', type=int, required=True)
parser.add_argument('--b', type=int, required=True)
parser.add_argument('--c', type=int, required=True)
parser.add_argument('--d', type=int, required=True)
parser.add_argument('--e', type=int, required=True)
args = parser.parse_args()
G = nx.DiGraph()
G.add_edges_from([(args.a, args.b), (args.b, args.c), (args.c, args.d), (args.d, args.e)])
print(nx.is_directed_acyclic_graph(G)) # 检查是否为有向无环图