#include <iostream>
using namespace std;

void pretty_triangleUp(int n);
void pretty_triangleDwn(int n,int extra);

int main()
{
  int n=1;
  while (n>0){
    cout << "enter the number of lines in the triangle you wish to print" <<
      endl;
    cin >> n;
    if (n>0){
      int l=n/2;
      int extra;
      pretty_triangleUp(n-l); //print top triangle
      if (l !=n-l) extra=1;
      else extra=0;
      pretty_triangleDwn(l,extra); //print bottom triangle 
    }
  }
}
void pretty_triangleUp(int n){
  int line_count=1;
  while (line_count <= n ){//print out spaces
   int spaces=n-line_count;
   while (spaces>0){
     cout << " ";
     spaces=spaces-1;
   }
   int letters=0; 
   while (letters < line_count){ //print out o's
     cout << "o ";
     letters=letters+1; 
   }
   cout << endl;
   line_count=line_count+1;
 }

}

void pretty_triangleDwn(int n,int extra){
  int line_count=1;
  while (line_count <= n ){
   int spaces=1;
   while (spaces<line_count+extra){ //print out spaces
     cout << " ";
     spaces=spaces+1;
   }
   int letters=n-line_count+1; 
   while (letters >0 ){  //print out o's
     cout << "o ";
     letters=letters-1; 
   }
   cout << endl;
   line_count=line_count+1;
  }

}