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Add new project - N_Queen #464

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2 changes: 1 addition & 1 deletion package-lock.json
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31 changes: 31 additions & 0 deletions public/N_Queen/index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>N-Queens Game</title>
<link rel="stylesheet" href="style.css">
</head>
<body>
<div class="container">

<h1>N-Queens Game</h1>

<div class="borad-details">
<div class="board-size">
<label for="boardSize">Choose Board Size (N):</label>
<input type="number" id="boardSize" min="4" value="4">
</div>
<div class="start-reset-button">
<button id="startGame">Start Game</button>
</div>
</div>

<button id="resetGame" class="reset-button" style="display: none;">Reset Game</button>
<p id="message"></p>
<div id="gameBoard"></div>

</div>
<script src="script.js"></script>
</body>
</html>
81 changes: 81 additions & 0 deletions public/N_Queen/script.js
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const startGameButton = document.getElementById("startGame");
const resetGameButton = document.getElementById("resetGame");
const boardInput = document.getElementById("boardSize");
const board = document.getElementById("gameBoard");
const message = document.getElementById("message");

let queens = [];

startGameButton.addEventListener("click", startGame);
resetGameButton.addEventListener("click", resetGame);

function startGame() {
const n = parseInt(boardInput.value);
if (isNaN(n) || n < 4) {
alert("Please enter a valid board size (minimum 4).");
return;
}

resetGame();

board.style.gridTemplateColumns = `repeat(${n}, 60px)`;
board.innerHTML = "";
message.textContent = "";

for (let i = 0; i < n * n; i++) {
const square = document.createElement("div");
square.classList.add("square");
square.addEventListener("click", () => placeQueen(i, n));
board.appendChild(square);
}

queens = [];
startGameButton.style.display = "none";
resetGameButton.style.display = "inline-block";
}

function placeQueen(index, n) {
const row = Math.floor(index / n);
const col = index % n;

if (queens.some(([r, c]) => r === row || c === col || Math.abs(r - row) === Math.abs(c - col))) {
message.textContent = "Invalid placement! Queens are attacking each other. Try again.";
message.classList.add("error");
highlightConflicts(row, col, n);
return;
}

queens.push([row, col]);
const squares = document.querySelectorAll(".square");
squares[index].innerHTML = `<span class="queen">&#9819;</span>`;
message.textContent = "";

if (queens.length === n) {
message.textContent = "Congratulations! You've placed all queens safely!";
message.classList.remove("error");
}
}

function highlightConflicts(row, col, n) {
const squares = document.querySelectorAll(".square");
squares.forEach((square, index) => {
const r = Math.floor(index / n);
const c = index % n;

if (r === row || c === col || Math.abs(r - row) === Math.abs(c - col)) {
square.classList.add("highlight");
} else {
square.classList.remove("highlight");
}
});
}

function resetGame() {
board.innerHTML = "";
queens = [];
message.textContent = "";
message.classList.remove("error");
startGameButton.style.display = "inline-block";
resetGameButton.style.display = "none";
}
136 changes: 136 additions & 0 deletions public/N_Queen/style.css
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body {
font-family: 'Arial', sans-serif;
background-color: #121212;
color: #ffffff;
text-align: center;
margin: 0;
padding: 0;
}

.container {
max-width: fit-content;
margin: 20px auto;
padding: 20px;
background: #1e1e2f;
box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
border-radius: 15px;
}

h1 {
font-size: 2.5em;
color: #ff6347;
margin-bottom: 20px;
}

label {
font-weight: bold;
font-size: 1.2em;
color: #ffa07a;
padding-bottom: 20px;
}

input[type="number"] {
margin: 10px 0;
padding: 8px;
font-size: 1.1em;
border: 2px solid #ffa07a;
border-radius: 8px;
width: 80px;
text-align: center;
background-color: #282c34;
color: #f6f6f6;
}

button {
background-color:#48bb78 ;
color: #fff;
border: none;
padding: 10px 20px;
font-size: 1.2em;
border-radius: 8px;
cursor: pointer;
transition: background-color 0.3s;
}

button:hover {
background-color: #6cde9b;
}

#gameBoard {
display: grid;
margin: 20px auto;
border: 4px solid #ff6347;
background: #2c2f40;
width: fit-content;
border-radius: 10px;
}

.square {
width: 60px;
height: 60px;
display: flex;
justify-content: center;
align-items: center;
font-size: 24px;
border: 0.5px solid #e4806e;
cursor: pointer;
transition: background-color 0.3s;
}

.square:nth-child(odd) {
background-color: #495057;
}

.square:nth-child(even) {
background-color: #343a40;
}

.queen {
font-size: 32px;
color: #ffa07a;
pointer-events: none;
}

#message {
font-size: 1.4em;
font-weight: bold;
margin-top: 20px;
color: #48bb78;
}

#message.error {
color: #e53e3e;
}

.highlight {
background-color: rgba(229, 62, 62, 0.6);
}

.reset-button {
background-color: #ff6347;
margin-top: 10px;
padding: 10px 20px;
color: #fff;
border: none;
border-radius: 8px;
font-size: 1.2em;
cursor: pointer;
transition: background-color 0.3s;

}

.reset-button:hover {
background-color:#f34b2e;
}

.board-details {
display: flex;
flex-direction: column;
}

.board-size{
padding-bottom:20px;
}


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