def abc(n): //Python的初始化二维数组,真是头疼
temp =[[0 for col in range(n)]for row in range(n)] for i in range(1, n): for j in range(0, i): if j==0:
temp[i][j]= 1 else:
temp[i][j]= temp[i-1][j-1]+ temp[i-1][j] for i in range(0, n): for j in range(0, i): print(temp[i][j], end=" ") print('\n');