import java.util.Scanner;
 
public class Main {
 
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int suma =0;
 
        while (scanner.hasNextInt()) {
            int liczbaA = scanner.nextInt();
            if (liczbaA > -100 && liczbaA < 100) {
                suma = liczbaA + suma;
                System.out.println(suma);
            } else {
                scanner.close();
                break;
 
            }
        }
    }
}

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