package program5;

import java.util.Arrays;
import java.util.Scanner;
import java.util.Vector;

class WektoryRoznejDlugosciException extends Exception {

    public final int sizeOfVectorA, sizeOfVectorB;

    public WektoryRoznejDlugosciException(int sizeOfVectorA, int sizeOfVectorB) {
	super("Wektory sa roznej dlugosci");
        this.sizeOfVectorA = sizeOfVectorA;
        this.sizeOfVectorB = sizeOfVectorB;
}

}
public class Program5 {

    public static void main(String[] args) {
        Vector<Double> vectorA = new Vector<Double>();
        vectorA=readVector();
        Vector<Double> vectorB = new Vector<Double>();
        vectorB=readVector();
        boolean danePrawidlowe = false;
        do{
            try{
                danePrawidlowe = false;
                addVectors(vectorA, vectorB);
            }catch(WektoryRoznejDlugosciException exception){
                System.out.println("Błąd: " + exception.getMessage() + " " + exception.sizeOfVectorA + " != " + exception.sizeOfVectorB);
                System.out.println("Podaj ponownie wektory.");
                danePrawidlowe = true;
            }
        }while(danePrawidlowe);
//        for(int i=0; i<vectorA.size(); i++){
//            System.out.print(vectorA.get(i) + " ");
//            System.out.print(vectorB.get(i) + " ");
//        }

    }
    static Vector<Double> readVector(){
        String liczbaString;
        Scanner in = new Scanner(System.in);
        liczbaString = in.nextLine();
        //System.out.println(liczbaString);
        String[] liczbaStringSplit = liczbaString.split("\\s+");
        double[] liczbaStringNaDouble = Arrays.stream(liczbaStringSplit).mapToDouble(Double::parseDouble).toArray();
        Vector<Double> vector = new Vector<Double>();
        for(int i=0; i<liczbaStringNaDouble.length; i++){
            vector.add(liczbaStringNaDouble[i]);
        }
        return vector;
    }
    static Vector<Double> addVectors(Vector<Double> vectorA, Vector<Double> vectorB)throws WektoryRoznejDlugosciException{
        if(vectorA.size() != vectorB.size()){
            throw new WektoryRoznejDlugosciException(vectorA.size(), vectorB.size());
        }
        Vector<Double> vectorSuma = new Vector<Double>(vectorA.size());
        for(int i = 0; i < vectorA.size(); ++i){
            vectorSuma.add(vectorA.elementAt(i) + vectorB.elementAt(i));
        }
        return vectorSuma;
    }
}