11. Equal Sums

import java.util.Scanner;
import java.util.Arrays;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int[] numbers = Arrays
                .stream(scanner.nextLine().split(" "))
                .mapToInt(Integer::parseInt)
                .toArray();

        boolean isFound = false;

        for (int i = 0; i < numbers.length; i++) {
            int rightSum = 0, leftSum = 0;
            for (int r = i + 1; r < numbers.length; r++) {
                rightSum += numbers[r];
            }
            for (int l = i - 1; l >= 0; l--) {
                leftSum += numbers[l];
            }
            if (rightSum == leftSum) {
                System.out.println(i);
                isFound = true;
                break;
            }
        }

        if (!isFound) {
            System.out.println("no");
        }
    }
}