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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>DSCode - Master Data Science, AI & ML</title>
<meta name="description" content="Master Data Science, AI, and Machine Learning with curated problems, tutorials, and roadmaps">
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<h1 class="hero-title">Master Data Science, AI & ML</h1>
<p class="hero-subtitle">Curated problems and resources to ace your data science interviews and build real-world ML systems</p>
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<div class="stat-value" id="totalProblems">445+</div>
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<div class="problem-item" data-difficulty="medium" data-topic="ml" data-problem-id="ml18">
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<div class="problem-content">
<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">ROC Curves and AUC</a>
<span class="badge badge-medium">Medium</span>
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</div>
<div class="problem-item" data-difficulty="medium" data-topic="ml" data-problem-id="ml19">
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</div>
<div class="problem-content">
<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">Confusion Matrix Analysis</a>
<span class="badge badge-medium">Medium</span>
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</div>
<div class="problem-item" data-difficulty="medium" data-topic="ml" data-problem-id="ml20">
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<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">K-Fold Cross-Validation</a>
<span class="badge badge-medium">Medium</span>
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<div class="problem-item" data-difficulty="hard" data-topic="ml" data-problem-id="ml21">
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<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">Gradient Boosting (XGBoost, LightGBM, CatBoost)</a>
<span class="badge badge-hard">Hard</span>
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<div class="problem-item" data-difficulty="hard" data-topic="ml" data-problem-id="ml22">
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<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">Support Vector Machines (SVM)</a>
<span class="badge badge-hard">Hard</span>
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<div class="problem-item" data-difficulty="hard" data-topic="ml" data-problem-id="ml23">
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<a href="javascript:void(0)" class="problem-title" onclick="openTopicDetail(this)">Gaussian Mixture Models (GMM)</a>
<span class="badge badge-hard">Hard</span>
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</div>
<div class="problem-item" data-difficulty="hard" data-topic="ml" data-problem-id="ml24">