Подскажите в чем проблема???
package com.javarush.task.task04.task0442;
/*
Суммирование
*/
import java.io.*;
public class Solution {
public static void main(String[] args) throws Exception {
//напишите тут ваш код
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String s1 = br.readLine();
String s2 = br.readLine();
String s3 = br.readLine();
int a = Integer.parseInt(s1);
int b = Integer.parseInt(s2);
int c = Integer.parseInt(s3);
int Sum = (a + b + c);
while (a != -1 || b != -1 || c != -1) {
System.out.println(Sum);
break;
}
if (a == -1 || b == -1 || c == -1) {
Sum += -1;
System.out.println(Sum);
}
}
}