#include <iostream>
using namespace std;

void spaces(int x) {
   for (int c = 1; c <= x; c++)
      cout << " ";
}

void stars(int x) {
   for (int c = 1; c <= x; c++)
      cout << "*";
}

void row(int r, int rows) {
   spaces (rows - r);
   stars (2);
   spaces (2*(r - 1));
   stars (1);
   cout << endl;
}

void top_row(int rows) {
   spaces (rows);
   stars (1);
   cout << endl;
}

int main() {
   int r, rows;
   cout << "Size of diamond? ";
   cin >> rows;

   top_row(rows);
   for (r = 1; r <= rows; r ++) row(r, rows);
   for (r = rows - 1; r >= 1; r --) row (r, rows);
   top_row(rows);
   return 0; 
}