Learn-Coding/dsa-problems.html at main · mithleshprasad/Learn-Coding · GitHub

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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>DSA Problems with Code Editor</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/codemirror.min.css">
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f9f9f9;
        }
        header {
            background-color: #4CAF50;
            color: white;
            padding: 20px;
            text-align: center;
        }
        header h1 {
            margin: 0;
            font-size: 2.5em;
        }
        .container {
            padding: 20px;
        }
        .topic {
            margin-bottom: 30px;
        }
        .topic h2 {
            margin-bottom: 10px;
            color: #4CAF50;
            border-bottom: 2px solid #4CAF50;
            display: inline-block;
        }
        .problems {
            list-style-type: none;
            padding: 0;
        }
        .problems li {
            margin: 5px 0;
            padding: 10px;
            background: white;
            border-radius: 5px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            cursor: pointer;
        }
        .problems li a {
            text-decoration: none;
            color: #333;
            font-weight: bold;
        }
        .problems li a:hover {
            color: #4CAF50;
        }
        .editor-container {
            margin-top: 20px;
            background: #ffffff;
            padding: 20px;
            border-radius: 5px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        .editor-header {
            margin-bottom: 10px;
            font-size: 1.2em;
            color: #4CAF50;
        }
        #codeEditor {
            border: 1px solid #ddd;
            height: 300px;
        }
        button {
            margin-top: 10px;
            padding: 10px 15px;
            font-size: 1em;
            color: white;
            background-color: #4CAF50;
            border: none;
            border-radius: 5px;
            cursor: pointer;
        }
        button:hover {
            background-color: #45a049;
        }
        .select-lang, .time-complexity {
            margin-top: 10px;
        }
        #output {
            margin-top: 10px;
            background: #f1f1f1;
            padding: 10px;
            border-radius: 5px;
        }
    </style>
</head>
<body>
    <header>
        <h1>DSA Problems with Code Editor</h1>
    </header>
    <div class="container">
        <div class="topic">
            <h2>Problem 1: Find the Maximum Subarray Sum</h2>
            <p>Write a function to find the maximum sum of a contiguous subarray.</p>
        </div>

        <div class="editor-container">
            <div class="editor-header">Code Editor</div>

            <label for="langSelect">Select Language:</label>
            <select id="langSelect" class="select-lang">
                <option value="javascript">JavaScript</option>
                <option value="python">Python</option>
                <option value="java">Java</option>
            </select>

            <label for="timeComplexity">Time Complexity:</label>
            <input type="text" id="timeComplexity" class="time-complexity" placeholder="Enter Time Complexity">

            <textarea id="codeEditor">// Example: Find the maximum subarray sum
function maxSubarraySum(arr) {
    let maxSum = arr[0];
    let currentSum = arr[0];
    for (let i = 1; i < arr.length; i++) {
        currentSum = Math.max(arr[i], currentSum + arr[i]);
        maxSum = Math.max(maxSum, currentSum);
    }
    return maxSum;
}
maxSubarraySum([1, 2, 3, -2, 5]);</textarea>

            <button onclick="runCode()">Run Code</button>
            <pre id="output"></pre>
        </div>
    </div>

    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/codemirror.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/mode/javascript/javascript.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/mode/python/python.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/codemirror/5.65.13/mode/clike/clike.min.js"></script>
    <script>
        // Initialize CodeMirror editor
        const editor = CodeMirror.fromTextArea(document.getElementById("codeEditor"), {
            lineNumbers: true,
            mode: "javascript", // Default language mode
            theme: "default",
        });

        // Function to update editor mode based on selected language
        document.getElementById("langSelect").addEventListener("change", function() {
            const lang = this.value;
            let mode = "javascript"; // Default mode

            if (lang === "python") {
                mode = "python";
            } else if (lang === "java") {
                mode = "clike";
            }

            editor.setOption("mode", mode);
        });

        // Function to run the code
        function runCode() {
            const userCode = editor.getValue();
            const lang = document.getElementById("langSelect").value;
            let output = '';

            // Evaluate the code based on the selected language
            try {
                if (lang === "javascript") {
                    output = eval(userCode);
                } else if (lang === "python") {
                    // For Python, we'll simulate with a simple example (use actual Python eval on server side)
                    output = "Python code execution is not supported in the browser.";
                } else if (lang === "java") {
                    // For Java, we would need a backend solution to execute Java code
                    output = "Java code execution is not supported in the browser.";
                }
                document.getElementById("output").textContent = `Output: ${output}`;
            } catch (error) {
                document.getElementById("output").textContent = `Error: ${error.message}`;
            }

            // Display Time Complexity
            const timeComplexity = document.getElementById("timeComplexity").value;
            if (timeComplexity) {
                document.getElementById("output").textContent += `\nTime Complexity: ${timeComplexity}`;
            }
        }
    </script>
</body>
</html>