#include

"

iostream

"

using

namespace

std;

int

main()

{

int

n,i,j;

int

b[

720

][

720

];

while

(cin

>>

n)

{

memset(b,

0

,

sizeof

(b));

if

(n

==

1

) cout

<<

n

<<

endl;

else

{

i

=

1

,j

=

1

;

int

k

=

1

;

for

(

int

t

=

1

; t

<

n ; t

++

)

{

while

(j

<=

n

-

i

+

1

&&

j

>=

i)

//

横行->rigth

{

b[i][j]

=

k

++

;

if

(k

==

n

*

n)

break

;

j

++

;

}

if

(k

-

1

==

n

*

n)

break

;

j

--

;

while

(i

<

j

&&

i

>=

n

-

j

+

1

)

//

竖行down

{

i

++

;

b[i][j]

=

k

++

;

if

(k

-

1

==

n

*

n)

break

;

}

if

(k

-

1

==

n

*

n)

break

;

while

(j

>

n

-

i

+

1

)

//

横行lift

{

j

--

;

b[i][j]

=

k

++

;

if

(k

-

1

==

n

*

n)

break

;

}

i

--

;

if

(k

-

1

==

n

*

n)

break

;

while

(i

>

j

&&

i

<

n

-

j

+

1

)

//

竖行up

{

b[i][j]

=

k

++

;

if

(k

-

1

==

n

*

n)

break

;

i

--

;

}

if

(k

-

1

==

n

*

n)

break

;

i

++

;j

++

;

}

for

(i

=

1

;i

<=

n;i

++

)

{

for

(j

=

1

;j

<=

n;j

++

)

{

printf(

"

%d

"

,b[i][j]);

if

(j

<=

n) cout

<<

"

"

;

}

cout

<<

endl;

}

}

}

return

0

;

}