from random import randint as rd
import numpy as np
def DataMake():
    n=int(input("请输入设置的节点数："))
    node=range(1,n+1)
    node=list(node)
    m=rd(n-1,(n*(n-1))/2+1)
    DAG=np.zeros((n,n))
    for i in range(0,m):
        p1=rd(1,n-1)
        p2=rd(p1+1,n)
        x=node[p1-1]
        y=node[p2-1]
        l=np.random.randint(10,20)
        if DAG[x-1][y-1]!=0:
            continue
        else:
            DAG[x-1][y-1]=l
    print(DAG)
    np.savetxt("DAG.txt",DAG,fmt='%.2f')
DataMake()