题解 | #蛇形矩阵#

N = int(input())
list1 = [[1,]]


for i in range(0,N-1):
    list1.append([0])

for i in range(1,N):
    list1[i][0] = list1[i-1][0] + i

for i in range(0,N):
    for j in range(1,N-i):
        list1[i].append(list1[i][j-1] + i + j + 1)

for i in range(0,N):
    for j in range(0,N-i):
       print(list1[i][j],end=' ')
    print('')