如下Python代码执行时，输入 4 后，输出的数字图形是？
n = int(input())
for i in range(n, 0, -1):
for j in range(n - i):
print(0, end="")
for k in range(i):
print(k + 1, end="")
print()
1 2 3 4
1 2 3 0
1 2 0 0
1 0 0 0
1 2 3 4
0 1 2 3
0 0 1 2
0 0 0 1
1 2 3 4
2 3 4 0
3 4 0 0
4 0 0 0
0 0 0 1
0 0 1 2
0 1 2 3
1 2 3 4