package lesson04.home_work.level2;

public class BalanceChecker {
    public static void main(String[] args) {
        System.out.println(isBalanced(new int[]{1, 1, 1, 2, 1}));
        System.out.println(isBalanced(new int[]{2, 1, 1, 2, 1}));
        System.out.println(isBalanced(new int[]{1, 1}));
        try {
            System.out.println(isBalanced(new int[]{}));
        }catch (IllegalArgumentException e){
            System.out.println("array is empty");
        }
    }

    public static boolean isBalanced(int[] array) {
        if (array.length==0) throw new IllegalArgumentException();
        if (array.length==1) return false;

        for (int i = 1; i < array.length; i++) {
            int sumLeft = 0;
            for (int j = 0; j < i; j++) {
                sumLeft+=array[j];
            }
            int sumRight = 0;
            for (int j = i; j < array.length; j++) {
                sumRight+=array[j];
            }
            if (sumLeft==sumRight) return true;
        }
        return false;
    }
}
//output
// {1, 1, 1, 2, 1} => true
// {2, 1, 1, 2, 1} => false
// {1, 1} => true
// {} => array is empty