Python3 代码

n, m = input().split()

m = int (m)
n = int (n)
l = [[0]* m for i in range (n)]

x = y = 0

dx = [-1, 0, 1, 0]
dy = [0, 1, 0, -1]
d = 1

for i in range (1, m * n + 1):
    l [x][y] = i
    a = x + dx[d]
    b = y + dy[d]

    if a<0 or a>=n or b<0 or b>=m or l[a][b]>0:
        d = (d + 1) % 4
        a = x + dx[d]
        b = y + dy[d]
    x = a
    y = b

for i in range (n):
    for j in range (m):
        print (l[i][j], end = " ")
    print ("")