помогите
package com.javarush.task.task04.task0442;
/*
Суммирование
*/
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
while (true) {
String a = reader.readLine();
int number = Integer.parseInt(a); ;
int c = 0;
c = c+number;
if (number==-1)
System.out.println(c);
break;
}
}
}