Spyral Matrix

Num = int(input())

Tabl = [[0] * Num for i in range(Num)]
x = 0
y = -1
counter = 1
delta = 1

for k in range(Num, 0, -1):
    if (y!=-1):
        for i in range (k):
            x += delta
            Tabl[x][y] = counter
            counter += 1
        delta = -delta
    for j in range (k):
        y += delta
        Tabl[x][y] = counter
        counter += 1

for i in range (Num):
    print(' '.join('{0}'.format(e) for e in Tabl[i]))