#include <iostream.h>

main()
{
	int x=5, y=5, a=3, b=0, c=0, d=0, l=0,e =0;
	l=a-1;
	for (;d < l;d++)
	{
		for (;c < x;c++) 
		{
			b=b + y;
			e=e+b;
		}
		
	}
	cout << "\nanswer is >" << e<<endl<<endl;
	return(0);
}