06. Equal Sums

function solve(array) {
    function equalSum(array) {
        if(array.length===1){
            return 0;
        }
        let right_sum = 0;
        let left_sum = 0;
        for (let i = 1; i < array.length; i++) {
            right_sum += array[i];
        }
        for (let    i = 0, j = 1; j < array.length; i++, j++) {
            right_sum -= array[j];
            left_sum += array[i];
            if (left_sum === right_sum) {
                return i+1;
            }
        }
        return "no";
    }

    console.log(equalSum(array));
}