#include<iostream.h>
#include<conio.h>
int factorial (int n)
{
 if(n==0)
  return 1;
 else
  if (n>0)
   return n*factorial(n-1);
}
void main()
{int i, c_pos=0, c_fav=0;
for(i=0;i<=9;i++)
{c_pos++;
  if((factorial(i+1)-factorial(i))<=100)
   c_fav++;
}
cout<<"Probabilitatea ca o cifra x sa verifice inegalitatea (x+1)!-x!<=100 este ";
cout<<endl<<"---// "<<c_fav<<"/"<<c_pos<<" = "<<(float)c_fav/c_pos<<" //---";
getch();
}