n = int(input()) a = [ [0]*n for x in range(n)] for t in range(n): #斜对角线 #to right for i in range(t,n): a[t][i] = t+1 #行号为t,列号i,列变化+1 #to bottom for i in range(t,n): a[i][t] = t + 1 #列变化+1 for row in a: print(*row)