题解 | 杨辉三角

n=int(input())
line=[]
def tri(n):
    for i in range(n):
        a=[1]*(i+1)
        line.append(a)
        if i>=2:
            for j in range(1,i):
                line[i][j]=line[i-1][j]+line[i-1][j-1]
    return line
tri(n)
linenew=[]
for c in line:
    linenew.append(map(str,c))
for k in linenew:
    b=" ".join(k)
    print(b)