#include<stdio.h>int main(){ int i,j,n; scanf("%d",&n); for(i=1;i<=n;i=i+1) { for(j=1;j<=n;j=j+1) { if(j==n || j==1 || i==1 || i==n ) { printf("*"); } else { printf(" "); } } printf("\n"); } return 0; }