n = int(input()) #n行，n列 a = [ [0]*n for x in range(n)] #[0] * n 一维列表, for t in range(1,n+1): for j in range(t-1,n): a[t-1][j] = t #向右填充数字t a[j][t - 1] = t #向下填充数字 t for row in a: print(*row)