Genetics

import java.util.Scanner;

public class Genetics {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String parent1 = scanner.nextLine();
        String parent2 = scanner.nextLine();
        int split = Integer.parseInt(scanner.nextLine());


        String child1 = parent1.substring(0, split) + parent2.substring(split);
        System.out.println("child1 = " + child1);
        String child2 = parent2.substring(0, split) + parent1.substring(split);
        System.out.println("child2 = " + child2);

        int child1ones = 0, child2ones = 0;
        for (int i = 0; i < child1.length(); i++) {
            if (child1.charAt(i) == '1')
                child1ones++;
            if (child2.charAt(i) == '1')
                child2ones++;
        }

        double child1fit = (double) child1ones / child1.length();
        System.out.println("child1's fitness level: " + child1fit);
        double child2fit = (double) child2ones / child1.length();
        System.out.println("child2's fitness level: " + child2fit);


        boolean isSurvivor = false;
        String survivor = "";
        String survivorFlipped="";
        double survivorFit = 0.0;

        if (child1fit >= child2fit) {
            isSurvivor = true;
            survivor = child1;
            survivorFit = child1fit;
           // System.out.println("survivor is child1, with fitness level of " + child1fit);

        } else if (child2fit >= child1fit) {
            isSurvivor = true;
            survivor = child2;
            survivorFit=child2fit;
           // System.out.println("survivor is child2, with fitness level of " + child2fit);

        }

        if (survivorFit > 0.5){
            System.out.println(survivor);
        }else if (survivorFit < 0.5){
            for (int i = survivor.length()-1; i >=0 ; i--) {
                survivorFlipped += survivor.charAt(i);
            }

            System.out.println(survivorFlipped);
        }









    }
}