3_1 dowhil

package lab1;

import static java.lang.Math.pow;

import java.util.Scanner;

public class Lab3_1_dowhile {

    public static void main(String[] args) {
        double a,e,s1,s2;
        int k = 1, j = 1, L, M;

        Scanner input = new Scanner(System.in);

        System.out.print("L");
        L = input.nextInt();

        System.out.print("M");
        M = input.nextInt();

        System.out.print("a");
        a = input.nextDouble();

        input.close();

        e = 1.0;
        s1 = 0;
        s2 = 0;

        do {
            e *= a * (pow(k,2)+1.0);
            s2 += (pow(k,2)/(a+1.0));
            k++;
        }
        while(k<=M);

        do {
            s1 += ((j+2.0)/j);
            j++;
        }
        while(j<=L);

        System.out.print(e+s1-s2);

    }

}