var assert = require('assert');

​

function Node(val, next, random) {

    this.val = val;

    this.next = next;

    this.random = random;

};

​

function cloneRandomList(head) {

    // add your code here

    return;

}

​

​

try {

    let head = new Node(1);

    head.next = new Node(2);

    head.random = head.next;

    head.next.next = null;

    head.next.random = head.next;

    let lst, random = listToString(head);

    let lstAns, randomAns = listToString(cloneRandomList(head));

    assert.equal(lst, lstAns);

    assert.equal(random, randomAns);

    console.log('PASSED: ' + "`cloneRandomList([[1, 1],[2, 1]]) should return `[[1, 1],[2, 1]]`");

} catch (err) {

    console.log(err);