题解 | 杨辉三角

n=int(input())
matrix=[]
for i in range(0,n):
    lst=[]
    for j in range(0,i+1):
        if i==j or j==0:
            item=1
        else:
            item=matrix[i-1][j-1]+matrix[i-1][j]
        lst.append(item)
    matrix.append(lst)
for lst in matrix:
    for item in lst:
        print(item,end=" ")
    print("")