题解 | #蛇形矩阵#

a = int(input())
resault1 = []
for i in range(a, 0, -1):
    resault1tamp = []
    for j in range(i):
        resault1tamp.append(1)
    resault1.append(resault1tamp)
for i in range(a):
    if i == 0:
        for j in range(1, len(resault1[i])):
            resault1[i][j] = resault1[i][j - 1] + i + j + 1
    else:
        for j in range(len(resault1[i])):
            resault1[i][j] = resault1[i - 1][j + 1] - resault1[0][0]
for i in range(a):
    if i != 0:
        print()
    for j in resault1[i]:
        print(j, end=" ")