Envío 6179

Código

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();

        long totalCount = 0;
        int[] array = new int[n];

        for(int i=0; i<n; i++){
            array[i] = scanner.nextInt();
            totalCount+=array[i];
        }

        long left = 0;
        for(int i=0; i<=n; i++){
            if(i==n){
                System.out.println("Impossible");
                break;
            }

            left += array[i];
            long right = totalCount - left;

            if(left > 0 && right < 0){
                System.out.println(i+1);
                break;
            }
        }
    }
}