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index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<script src="https://cdn.tailwindcss.com"></script>
<title>Add two numbers on a represented linked list</title>
</head>
<body class="bg-slate-900 text-white">
<nav
class="flex items-center justify-between z-50 flex-wrap bg-slate-800 px-5 pt-1 pb-1 lg:px-20 sticky top-0 text-center border-b border-blue-600 shadow-sm"
>
<div class="flex items-center flex-shrink-0 text-slate-50 mr-6 p-2">
<a href="">
<img src="logo.png" class="mr-2 h-8 w-8" alt="Logo" />
</a>
<a href="/" class="font-bold text-xl">Add Two Numbers Linked List</a>
</div>
<div class="lg:hidden">
<div
class="flex items-center px-3 py-2 border rounded text-slate-50 border-blue-600 hover:text-slate-50 hover:border-gray-500"
onclick="toggleMenu()"
>
<svg
class="fill-current h-3 w-3"
viewBox="0 0 20 20"
xmlns="http://www.w3.org/2000/svg"
>
<path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z" />
</svg>
</div>
</div>
<div
id="menu"
class="w-full hidden text-left lg:flex lg:items-center lg:w-auto"
>
<div class="text-md">
<a
href="/"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-50 hover:text-slate-600 font-semibold mr-4"
>
Home
</a>
<a
href="#"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-50 hover:text-slate-600 font-semibold mr-4"
>
About
</a>
<a
href="#"
class="block mt-4 lg:inline-block lg:mt-0 text-slate-50 hover:text-slate-600 font-semibold mr-4"
>
Contact
</a>
</div>
</div>
<div id="github" class="hidden lg:flex">
<a
href="https://github.com/sauravhathi/"
class="inline-block font-bold px-4 py-2 leading-none border rounded text-slate-50 border-blue-600 hover:border-transparent hover:text-white hover:bg-blue-600 mt-4 lg:mt-0"
>
Github
</a>
</div>
</nav>
<hero
class="grid px-5 lg:px-14 grid-cols-1 lg:grid-cols-2 items-center justify-items-center h-screen"
>
<div class="flex flex-col items-center lg:items-start gap-20">
<div class="w-10/12">
<h1 class="text-4xl font-bold">Add Two Numbers Linked List</h1>
<p class="text-xl mt-4">
This is a simple web app that adds two numbers represented by a
linked list.
</p>
</div>
<div>
<a href="#find">
<button
class="bg-slate-800 hover:bg-blue-600 text-white px-14 py-4 rounded-md text-xl hover:animate-bounce font-semibold border border-blue-600"
>
Get Started
</button>
</a>
</div>
</div>
<div class="hidden lg:block">
<img
src="hero.png"
class="rounded-xl w-11/12 p-4 border-2 border-white border-opacity-50 shadow-xl"
alt="Hero"
/>
</div>
</hero>
<div class="container mx-auto border-t border-blue-600">
<div class="flex justify-center items-center h-screen">
<div class="xl:w-1/3 lg:w-1/2 md:w-2/3 w-3/4">
<div id="find" class="mb-10">
<h1 class="text-2xl font-bold text-center">
Add Two Numbers Linked List
</h1>
</div>
<div
class="bg-slate-800 shadow-md rounded px-8 pt-6 pb-8 mb-4 border border-blue-600"
>
<div class="mb-4">
<label
class="block text-slate-50 text-sm font-bold mb-2"
for="list1"
>
Enter the first numbers
</label>
<input
class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline"
id="list1"
name="list1"
type="text"
placeholder="e.g. 5 6 3"
onchange="reset()"
value="5 6 3"
/>
<p class="text-red-500 text-xs mt-2" id="list-error"></p>
<label
class="block text-slate-50 text-sm font-bold mb-2"
for="list2"
>
Enter the second numbers
</label>
<input
class="shadow appearance-none border rounded w-full py-2 px-3 text-gray-700 leading-tight focus:outline-none focus:shadow-outline"
id="list2"
name="list2"
type="text"
placeholder="e.g. 8 4 2"
onchange="reset()"
value="8 4 2"
/>
<p class="text-red-500 text-xs mt-2" id="list-error"></p>
</div>
<div class="flex items-center justify-end">
<button
class="bg-slate-50 hover:bg-slate-700 hover:text-slate-50 text-slate-900 font-bold py-2 px-4 rounded focus:outline-none focus:shadow-outline"
type="submit"
id="submit"
onclick="addTwoNumber()"
>
Submit
</button>
</div>
<hr class="my-4" />
<div class="mt-4 text-left hidden" id="result-div">
<h1 class="text-xl font-bold">Result</h1>
<div class="mt-4">
<p id="result"></p>
</div>
</div>
</div>
</div>
</div>
</div>
<footer
class="text-center bg-slate-800 text-sm p-4 bottom-0 border-t border-blue-600 w-full"
>
Made with ❤️ by
<a href="https://github.com/sauravhathi/" class="text-blue-600"
>Saurav Hathi</a>
</footer>
<script>
// responsive menu bar
function toggleMenu() {
var menu = document.getElementById("menu");
var github = document.getElementById("github");
if (
menu.classList.contains("hidden") &&
github.classList.contains("hidden")
) {
menu.classList.remove("hidden");
github.classList.remove("hidden");
} else {
menu.classList.add("hidden");
github.classList.add("hidden");
}
}
// get value from input
function getList() {
var list1 = document.getElementById("list1").value;
var list2 = document.getElementById("list2").value;
// remove beginning and ending spaces and split the string
list1 = list1.trim().split(" ");
list2 = list2.trim().split(" ");
// if list is empty
list1 = list1.filter((item) => item !== "");
list2 = list2.filter((item) => item !== "");
// return the lists
return [list1, list2];
}
// create a linked list
class ListNode {
constructor(val, next = null) {
this.val = val;
this.next = next;
}
}
// add two numbers represented by linked list and return the result
var addTwoNumbers = function (l1, l2) {
let sub = 0;
let head = new ListNode(l1.val + l2.val, null);
let sum = head;
if (sum.val > 9) {
sum.val = sum.val % 10;
sub = 1;
}
while (l1.next || l2.next) {
let num1 = 0;
let num2 = 0;
if (l1.next) {
l1 = l1.next;
num1 = l1.val;
}
if (l2.next) {
l2 = l2.next;
num2 = l2.val;
}
if (num1 + num2 + sub > 9) {
sum.next = new ListNode((num1 + num2 + sub) % 10, null);
sum = sum.next;
sub = 1;
} else {
sum.next = new ListNode(num1 + num2 + sub, null);
sum = sum.next;
sub = 0;
}
}
if (sub == 1) {
sum.next = new ListNode(1, null);
}
return head;
};
// validate the array
function validateArray(list1, list2) {
if (list1.length == 0 || list2.length == 0) {
return false;
}
for (var i = 0; i < list1.length; i++) {
if (isNaN(list1[i])) {
return false;
}
}
for (var i = 0; i < list2.length; i++) {
if (isNaN(list2[i])) {
return false;
}
}
return true;
}
// reset the result div
function reset() {
var [list1, list2] = getList();
var listError = document.getElementById("list-error");
var resultDiv = document.getElementById("result-div");
var result = document.getElementById("result");
// validate input
if (!validateArray(list1, list2)) {
console.log(list1, list2);
listError.innerHTML = "Please enter a valid list";
resultDiv.classList.add("hidden");
} else {
listError.innerHTML = "";
resultDiv.classList.add("hidden");
}
}
// clr the result div
function clr() {
var result = document.getElementById("result");
result.innerHTML = "";
}
// add two numbers
function addTwoNumber() {
var [list1, list2] = getList();
var result = document.getElementById("result");
var resultDiv = document.getElementById("result-div");
var listError = document.getElementById("list-error");
// validate input
if (!validateArray(list1, list2)) {
listError.innerHTML = "Please enter a valid list";
resultDiv.classList.add("hidden");
} else {
listError.innerHTML = "";
resultDiv.classList.remove("hidden");
while (list1.length < list2.length) {
list1.unshift(0);
}
while (list2.length < list1.length) {
list2.unshift(0);
}
var div = document.createElement("div");
div.classList.add("grid", "grid-cols-2", "gap-4", "mt-4");
var ul = document.createElement("ul");
ul.classList.add("flex", "flex-wrap", "gap-2");
var carry = 0;
var sum = [];
for (var i = list1.length - 1; i >= 0; i--) {
var temp = parseInt(list1[i]) + parseInt(list2[i]) + carry;
if (temp > 9) {
carry = 1;
sum.unshift(temp % 10);
} else {
carry = 0;
sum.unshift(temp);
}
}
if (carry == 1) {
sum.unshift(1);
}
var li = document.createElement("li");
li.classList.add(
"flex",
"items-center",
"bg-slate-900",
"border",
"border-blue-600",
"rounded",
"justify-around",
"text-white",
"text-2xl"
);
li.innerHTML = sum.join(" ");
ul.appendChild(li);
div.appendChild(ul);
result.appendChild(div);
}
}
</script>
</body>
</html>