n = int(input())
a = [[0]*n for _ in range(n)]
b = [[0]*n for _ in range(n)]
if n%2 == 0:
	for i in range(n):
		for j in range(n):
			if i%2 == 0:
				a[i][j] = j//2 + 1
			else:
				a[i][j] = n - (j//2)
			
			if j%2 == 0:
				b[i][j] = i+1
			else:
				b[i][j] = n-i
else:
	for i in range(n):
		for j in range(n):
			if i%2 == 0:
				a[i][j] = j+1
			else:
				a[i][j] = n-j
			
			if j%2 == 0:
				b[i][j] = i+1
			else:
				b[i][j] = n-i
for i in a:
	print(*i)
for i in b:
	print(*i)