package main

import (
	"bufio"
	"fmt"
	"math"
	"os"
	"strconv"
)

const MaxInt = math.MaxInt64

var scanner *bufio.Scanner

func isRange(x, y, n int) bool {
	return (0 <= x) && (x <= n) && (0 <= y) && (y <= n)
}

func main() {
	n := Int()
	mat := make([][]int, n)
	for i := 0; i < n; i++ {
		mat[i] = make([]int, n)
	}
	x, y, dx, dy := 0, -1, 0, 1
	no := 1
	for no <= n*n {
		nx := x + dx
		ny := y + dy
		if isRange(nx, ny, n-1) && mat[nx][ny] == 0 {
			mat[nx][ny] = no
			no++
			x, y = nx, ny
		} else {
			dx, dy = dy, -dx
		}
	}
	for i := 0; i < n; i++ {
		for j := 0; j < n; j++ {
			s := " "
			if j == n-1 {
				s = "\n"
			}
			fmt.Printf("%03d"+s, mat[i][j])
		}
	}
}

func init() {
	scanner = bufio.NewScanner(os.Stdin)
	scanner.Buffer([]byte{}, MaxInt)
	scanner.Split(bufio.ScanWords)
}

func Int() int {
	scanner.Scan()
	ret, _ := strconv.ParseInt(scanner.Text(), 10, 0)
	return int(ret)
}

func Ints(n int) []int {
	ret := make([]int, n)
	for i := 0; i < n; i++ {
		ret[i] = Int()
	}
	return ret
}

func Max(a, b int) int {
	if a < b {
		return b
	}
	return a
}

func Min(a, b int) int {
	if a < b {
		return a
	}
	return b
}