感觉没地方会报错啊？

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        int sum = 0;
        double s = 0;
        for (int i = 0; i < 12; i++) {
            Scanner sc = new Scanner(System.in);
            int a = sc.nextInt();
            sum+=300-a;
            s +=(sum/100)*100*1.2;
            sum%=100;
            if (sum<0){
                s = -(i+1);
                sum =0;
                break;
            }
        }
        s+=sum;
        System.out.println((int)s);
    }
}