#! /usr/bin/node

"use strict"

// by Frank Tan
// https://stackoverflow.com/questions/38400594/javascript-deep-comparison
function deepEqual(a,b)
{
    if( (typeof a == 'object' && a != null) &&
        (typeof b == 'object' && b != null) )
    {
        var count = [0,0];
        for( var key in a) count[0]++;
        for( var key in b) count[1]++;
        if( count[0]-count[1] != 0) {return false;}
        for( var key in a)
        {
            if(!(key in b) || !deepEqual(a[key],b[key])) {return false;}
        }
        for( var key in b)
        {
            if(!(key in a) || !deepEqual(b[key],a[key])) {return false;}
        }
        return true;
    }
    else
    {
        return a === b;
    }
}

function duplicatezeros(a) {
    let out = [];
    for (let t of a) {
        out.push(t);
        if (t == 0) {
            out.push(t);
        }
        if (out.length >= a.length) {
            break;
        }
    }
    if (out.length > a.length) {
        out.length = a.length;
    }
    return out;
}

if (deepEqual(duplicatezeros([1, 0, 2, 3, 0, 4, 5, 0]), [1, 0, 0, 2, 3, 0, 0, 4])) {
  process.stdout.write("Pass");
} else {
  process.stdout.write("FAIL");
}
process.stdout.write(" ");
if (deepEqual(duplicatezeros([1, 2, 3]), [1, 2, 3])) {
  process.stdout.write("Pass");
} else {
  process.stdout.write("FAIL");
}
process.stdout.write(" ");
if (deepEqual(duplicatezeros([0, 3, 0, 4, 5]), [0, 0, 3, 0, 0])) {
  process.stdout.write("Pass");
} else {
  process.stdout.write("FAIL");
}
process.stdout.write("\n");