import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    r, c = 0, 0
    dr, dc = 0, 1
    a = [[None]*n for _ in range(n)]
    for i in range(n*n):
        a[r][c] = i+1
        nr, nc = r+dr, c+dc
        if not (0 <= nr < n and 0 <= nc < n) or a[nr][nc] is not None:
            dr, dc = dc, -dr
        r += dr
        c += dc

    for row in a:
        for c in row:
            print(f'{c:03}', end=' ')
        print()


if __name__ == '__main__':
    main()