//---------------------------------------------------------------------------
#include <iostream.h>
#include <conio.h>
//---------------------------------------------------------------------------
 
int main(int argc, char* argv[])
{
 int inicial=0, final=0;
 int avance=1;
 
 cout << "Ingrese el inicio: ";
 cin >> inicial;
 cout << "Ingrese el final: ";
 cin >> final;
 cout << endl << inicial << endl;
 
 
 for(int i=inicial;i<final;i++,avance++)
 {
   for(int j=inicial;j<=(inicial+avance);++j)
    cout << j << " ";
   cout << endl;
 }
 getch();
 
 return 0;
}
//---------------------------------------------------------------------------