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