class P21 {

    public static void main (String [ ] args) {
	double sumb = 0, sume = 0;
	int suma = 0, sumc = 0, sumd = 0, i, ih;

	for (i=1; i<6; i++)
	    {
		suma += i*i;
	    }
	System.out.println("suma=" + suma);

	for (i=1; i<501; i++)
	    {
		sumb += 1/(double) i;
	    }
	System.out.println("sumb=" + sumb);

	for (i=-15; i<16; i++)
	    {
		ih = i*i;
		sumc += ih*ih;
	    }
	System.out.println("sumc=" + sumc);

	for (i=6; i<21; i++)
	    {
		sumd += 5;
	    }
	System.out.println("sumd=" + sumd);

	for (i=1; i<1001; i++)
	    {
		sume += Math.sin(i/50.0);
	    }
	System.out.println("sume=" + sume);
    }
}