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feat: create documentation site structure and add Spring AI & Agentic Systems learning module
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‎docs/dsa/index.html‎

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<!DOCTYPE html>
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Data Structures & Algorithms - Java Learning Hub</title>
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<link rel="stylesheet" href="../styles.css">
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<link rel="stylesheet" href="../styles.css?v=1781361599">
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<link rel="stylesheet" href="../java-basics/module.css">
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</head>
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<body>
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<aside class="sidebar">
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<div class="toc">
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<h3>Topics</h3>
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<ul>
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<ul id="tocList">
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<li><a href="#arrays">Arrays & Strings</a></li>
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<li><a href="#linked-lists">Linked Lists</a></li>
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<li><a href="#stacks-queues">Stacks & Queues</a></li>
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<td>Merge Sort, Quick Sort</td>
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</tr>
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<tr>
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<td><strong>O(n²)</strong></td>
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<td><strong>O(n&sup2;)</strong></td>
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<td>Quadratic</td>
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<td>Bubble Sort, Nested Loop</td>
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</tr>
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<h3>Common Problems</h3>
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<div class="practice-card">
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<h4>🔗 Two Sum | LeetCode #1</h4>
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<h4> Two Sum | LeetCode #1</h4>
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<p><strong>Problem:</strong> Given an array, find two numbers that add up to a target.</p>
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<p><strong>Time: O(n), Space: O(n)</strong></p>
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<p><a href="https://leetcode.com/problems/two-sum/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/two-sum/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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<div class="practice-card">
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<h4>💧 Container With Most Water | LeetCode #11</h4>
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<h4> Container With Most Water | LeetCode #11</h4>
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<p><strong>Problem:</strong> Find two lines that together with the x-axis form a container with maximum area.</p>
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<p><strong>Time: O(n), Space: O(1)</strong></p>
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<p><a href="https://leetcode.com/problems/container-with-most-water/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/container-with-most-water/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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<div class="practice-card">
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<h4>🔀 3Sum | LeetCode #15</h4>
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<h4> 3Sum | LeetCode #15</h4>
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<p><strong>Problem:</strong> Find all unique triplets that sum to zero.</p>
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<p><strong>Time: O(n&#10003; Space: O(1)</strong></p>
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<p><a href="https://leetcode.com/problems/3sum/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/3sum/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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</section>
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<h3>LeetCode Problems</h3>
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<div class="practice-card">
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<h4>🎯 Reverse Linked List | LeetCode #206</h4>
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<h4> Reverse Linked List | LeetCode #206</h4>
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<p><strong>Time: O(n), Space: O(1)</strong></p>
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<p><a href="https://leetcode.com/problems/reverse-linked-list/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/reverse-linked-list/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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<div class="practice-card">
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<h4>🔍 Detect Cycle | LeetCode #141</h4>
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<h4> Detect Cycle | LeetCode #141</h4>
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<p><strong>Time: O(n), Space: O(1)</strong> - Use Floyd's algorithm</p>
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<p><a href="https://leetcode.com/problems/linked-list-cycle/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/linked-list-cycle/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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</section>
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<h3>Common Problems</h3>
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<div class="practice-card">
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<h4>🎯 Valid Parentheses | LeetCode #20</h4>
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<h4> Valid Parentheses | LeetCode #20</h4>
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<p><strong>Time: O(n), Space: O(n)</strong></p>
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<p><a href="https://leetcode.com/problems/valid-parentheses/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/valid-parentheses/" target="_blank"> Practice on LeetCode</a></p>
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<h4>👚 Implement Queue using Stacks | LeetCode #232</h4>
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<h4> Implement Queue using Stacks | LeetCode #232</h4>
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<p><strong>Amortized Time: O(1)</strong></p>
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<p><a href="https://leetcode.com/problems/implement-queue-using-stacks/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/implement-queue-using-stacks/" target="_blank"> Practice on LeetCode</a></p>
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</div>
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<h3>LeetCode Problems</h3>
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<div class="practice-card">
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<h4>🌳 Validate Binary Search Tree | LeetCode #98</h4>
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<h4> Validate Binary Search Tree | LeetCode #98</h4>
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<p><strong>Time: O(n), Space: O(h)</strong></p>
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<p><a href="https://leetcode.com/problems/validate-binary-search-tree/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/validate-binary-search-tree/" target="_blank"> Practice on LeetCode</a></p>
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<h4>📊 Lowest Common Ancestor | LeetCode #236</h4>
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<h4> Lowest Common Ancestor | LeetCode #236</h4>
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<p><strong>Time: O(n), Space: O(h)</strong></p>
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<p><a href="https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree/" target="_blank"> Practice on LeetCode</a></p>
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</section>
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<h4>🔗 Number of Islands | LeetCode #200</h4>
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<p><strong>Time: O(m×n), Space: O(m×n)</strong></p>
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<p><a href="https://leetcode.com/problems/number-of-islands/" target="_blank">👉 Practice on LeetCode</a></p>
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<h4> Number of Islands | LeetCode #200</h4>
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<p><strong>Time: O(mn), Space: O(mn)</strong></p>
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<p><a href="https://leetcode.com/problems/number-of-islands/" target="_blank"> Practice on LeetCode</a></p>
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<td>O(n)</td>
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<td>O(n&sup2;)</td>
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<td>O(n&sup2;)</td>
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<td>O(1)</td>
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<td>Yes</td>
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<td>O(n log n)</td>
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<td>O(n&sup2;)</td>
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<h4>🔀 Sort an Array | LeetCode #912</h4>
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<h4> Sort an Array | LeetCode #912</h4>
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<p><strong>Challenge:</strong> Implement multiple sorting algorithms</p>
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<p><a href="https://leetcode.com/problems/sort-an-array/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/sort-an-array/" target="_blank"> Practice on LeetCode</a></p>
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<h4>💰 Coin Change | LeetCode #322</h4>
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<p><strong>Time: O(n×m), Space: O(n)</strong> where n=amount, m=coins</p>
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<p><a href="https://leetcode.com/problems/coin-change/" target="_blank">👉 Practice on LeetCode</a></p>
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<h4>&deg; Coin Change | LeetCode #322</h4>
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<p><strong>Time: O(nm), Space: O(n)</strong> where n=amount, m=coins</p>
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<p><a href="https://leetcode.com/problems/coin-change/" target="_blank"> Practice on LeetCode</a></p>
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<h4>🏘️ House Robber | LeetCode #198</h4>
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<h4> House Robber | LeetCode #198</h4>
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<p><strong>Time: O(n), Space: O(n)</strong></p>
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<p><a href="https://leetcode.com/problems/house-robber/" target="_blank">👉 Practice on LeetCode</a></p>
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<p><a href="https://leetcode.com/problems/house-robber/" target="_blank"> Practice on LeetCode</a></p>
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// TOC toggle (mobile)
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const tocToggle = document.getElementById('tocToggle');
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const tocEl = tocToggle ? tocToggle.closest('.toc') : null;
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if (tocToggle && tocEl) {
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tocToggle.addEventListener('click', function() {
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tocEl.classList.toggle('open');
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tocToggle.setAttribute('aria-expanded', tocEl.classList.contains('open'));
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const icon = tocToggle.querySelector('.toc-toggle-icon');
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if (icon) icon.textContent = tocEl.classList.contains('open') ? '\u25B2' : '\u25BC';
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});
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‎docs/index.html‎

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<link rel="stylesheet" href="styles.css?v=1781361599">
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<!-- Module 3: DSA -->
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<!-- Module 4: Java Backend -->
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<!-- Module 5: Spring AI & Agents -->
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<!-- Module 6: Resources & Guides -->
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<h4>Java Basics</h4>
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<p>2-3 weeks</p>
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<div class="arrow">→</div>
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<div class="arrow">&rarr;</div>
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<h4>OOP Concepts</h4>
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<h4>DSA Practice</h4>
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<div class="arrow">&rarr;</div>
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<h4>AI & Agents</h4>

‎docs/java-backend/index.html‎

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<span>Table of Contents</span>
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</button>
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<h3>Table of Contents</h3>
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<li><a href="#intro">Backend Basics</a></li>
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tocToggle.setAttribute('aria-expanded', tocEl.classList.contains('open'));
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if (icon) icon.textContent = tocEl.classList.contains('open') ? '\u25B2' : '\u25BC';
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