"use strict";

function main(formName) {
	let result = document.getElementById("result");
	let arr = [
		[1, 2, 3, [1, 2, 3]],
		[[[]]],
		3,
	];
	
	result.textContent = "Результат: " + countArr(arr);
}

function countArr(item, level = 0) { 
    if (item instanceof Array) {
        return (level > 0 ? 1 : 0) +
			item.map(
				(value, index) => countArr(value, level + 1)
			).reduce((a, b) => a + b, 0)
    }
    return 0;
}