题解 | 杨辉三角

n=int(input())

a=[[0 for _ in range(n)]for _ in range(n)]

for m in range(n):

    a[m][0]=1

for i in range(1,n):

    for j in range(1,i+1):

        a[i][j]=a[i-1][j]+a[i-1][j-1]

for i in range(n):

    for j in range(i+1):

        print(a[i][j],end=" ")

    print()