#include<stdio.h>

int main()

{

int i,j,k,n,m,a[15][15];

k=1;

while(k==1)

{

printf("enter a number that less than 15:\n");

scanf("%d",&n);

if((n!=0)&&(n<=15)&&(n%2!=0))

{

k=0;

}

}

for(i=1;i<=n;i++)

{

for(j=1;j<=n;j++)

{

a[i][j]=0;

}

}

j=n/2+1;

a[1][j]=1;

for(m=2;m<=n*n;m++)

{

i=i-1;

j=j+1;

if((i<1)&&(j>n))

{

i=i+2;

j=j-1;

}

else

{if(j>n) j=1;

if(i<1) i=n;}

}

if(a[i][j]==0)

{

a[i][j]=m;

}

else

{

i=i+2;

j=j-1;

a[i][j]=m;

}

for(i=1;i<=n;i++)

{

for(j=1;j<=n;j++)

{

printf("%5d",a[i][j]);

}printf("\n");

}printf("\n");

return 0;

}