Phân tích điểm
100 / 100
AC
|
C++17
vào lúc 24, Tháng 9, 2026, 8:33
weighted 93% (92,79pp)
100 / 100
AC
|
C++17
vào lúc 24, Tháng 9, 2026, 8:33
weighted 91% (91,41pp)
100 / 100
AC
|
C++17
vào lúc 23, Tháng 9, 2026, 15:19
weighted 87% (87,39pp)
Tác giả của các bài (208)
| Bài | Nhóm | Điểm |
|---|---|---|
| Decision Tree Best Split | Machine Learning | 100 |
| Gradient Boosting with Regression Stumps | Machine Learning | 100 |
| L2 Regularization Effect on Weight Norm | Machine Learning | 100 |
| Lasso Regression via Coordinate Descent | Machine Learning | 100 |
| Linear Model Inference | Machine Learning | 100 |
| Average Precision (PR Curve Area) | Machine Learning | 100 |
| Random Forest Classifier | Machine Learning | 100 |
| Ridge Regression | Machine Learning | 100 |
| ROC AUC Score | Machine Learning | 100 |
| Standardize-then-Ridge Pipeline | Machine Learning | 100 |
| Decision Tree Depth Tuning (XGBoost-style) | Machine Learning | 100 |
| Adjusted Rand Index | Machine Learning | 100 |
| DBSCAN | Machine Learning | 100 |
| Explained Variance Ratios | Machine Learning | 100 |
| Feature Scaling Impact on K-Means | Machine Learning | 100 |
| GMM E-Step (Responsibility Computation) | Machine Learning | 100 |
| Hierarchical Clustering (Single Linkage) | Machine Learning | 100 |
| K-Means++ Initialization | Machine Learning | 100 |
| MLE for Gaussian Distribution | Machine Learning | 100 |
| Gaussian Naive Bayes Classifier | Machine Learning | 100 |
| Silhouette Score | Machine Learning | 100 |
| A Plus B | test_problems | 5p |
| Mê Cung | Competitive Programming | 100p |
| Sinh Nhật | Competitive Programming | 100 |
| Viên Kẹo Thứ K | Competitive Programming | 100 |
| Đếm Trong Đoạn | Competitive Programming | 100 |
| Trồng Cây | Competitive Programming | 100 |
| Số Hamming | Competitive Programming | 100 |
| Chữ Số Thứ K | Competitive Programming | 100 |
| Trung Bình Lớn Nhất | Competitive Programming | 100 |
| Cực Tiểu Cực Đại | Competitive Programming | 100 |
| Bảng Nhân | Competitive Programming | 100 |
| Xưởng Bánh | Competitive Programming | 100 |
| Đọc Sách | Competitive Programming | 100 |
| Sắp Xếp Hiệu | Competitive Programming | 100 |
| Cạnh Tam Giác | Competitive Programming | 100 |
| Xâu ABC | Competitive Programming | 100 |
| Chia Nhóm | Competitive Programming | 100 |
| Cái Túi | Competitive Programming | 100 |
| Mã Đi Tuần | Competitive Programming | 100 |
| Dò Mìn | Competitive Programming | 100 |
| Hái Nấm | Competitive Programming | 100 |
| Xếp Hậu | Competitive Programming | 100 |
| Tập Con | Competitive Programming | 100 |
| Sudoku | Competitive Programming | 100 |
| Người Giao Hàng | Competitive Programming | 100 |
| Tạo Xâu | Competitive Programming | 100 |
| Chia Táo | Competitive Programming | 100 |
| Dãy Ngoặc | Competitive Programming | 100 |
| Tặng Quà | Competitive Programming | 100 |
| Trồng Nấm | Competitive Programming | 100 |
| Số Siu | Competitive Programming | 100 |
| Xâu Strix | Competitive Programming | 100 |
| Giá Trị Dãy Con | Competitive Programming | 100 |
| Bộ Số | Competitive Programming | 100 |
| Đếm Tam Giác | Competitive Programming | 100 |
| Đường Đi Ngẫu Nhiên | Competitive Programming | 110p |
| Eurokod | Competitive Programming | 50p |
| Ga Milano | Competitive Programming | 110p |
| Nhà Hàng Szeged | Competitive Programming | 110p |
| Trượt Băng Vrsar | Competitive Programming | 70p |
| Phương Trình | Competitive Programming | 100p |
| Trò Chơi | Competitive Programming | 100p |
| Mạng Máy Tính | Competitive Programming | 100p |
| Mật Khẩu | Competitive Programming | 100p |
| Dãy Số | Competitive Programming | 100p |
| Lễ Hội Ánh Sáng | Competitive Programming | 100p |
| Ổ Khóa Số | Competitive Programming | 100p |
| Mạng Lưới Giao Thông | Competitive Programming | 100p |
| Bet Thủ | Competitive Programming | 100p |
| Hoa Quả | Competitive Programming | 200 |
| Bản Đồ Kho Báu Của DoMixi | Competitive Programming | 100p |
| Tháp LEGO | Competitive Programming | 100p |
| Sân Khấu | Competitive Programming | 100p |
| Anh DoMixi Bắt Rắn | Competitive Programming | 100p |
| Dãy Con Phẳng | Competitive Programming | 100 |
| Vườn Hoa | Competitive Programming | 100 |
| Tháp Hà Nội | Competitive Programming | 100 |
| Đếm Dãy Con | Competitive Programming | 100 |
| Dãy Con Tăng | Competitive Programming | 100 |
| Dự Án | Competitive Programming | 100 |
| Ghép Từ | Competitive Programming | 100 |
| Binary Tree Root-to-Leaf Paths | Machine Learning | 100 |
| Consistent Hashing Ring | Machine Learning | 100 |
| Interval Scheduling Maximisation | Machine Learning | 100 |
| LRU Cache Simulation | Machine Learning | 100 |
| Serialize and Deserialize Binary Tree | Machine Learning | 100 |
| Disjoint Set Operations | Machine Learning | 100 |
| KD-Tree Nearest Neighbor | Machine Learning | 100 |
| Minimum Spanning Tree (Kruskal's Algorithm) | Machine Learning | 100 |
| Topological Sort | Machine Learning | 100 |
| Phòng Thí Nghiệm | Competitive Programming | 100 |
| Công Viên | Competitive Programming | 100 |
| Truy Vấn Cây | Competitive Programming | 100 |
| Truy Vấn Cây 2 | Competitive Programming | 100 |
| Truy Vấn Đường Đi | Competitive Programming | 100 |
| Đổi Gốc Cây | Competitive Programming | 100 |
| Truy Vấn Cây Con | Competitive Programming | 100 |
| Cập Nhật Cây Con | Competitive Programming | 100 |
| Hàm Hợp Lớn Nhất | Competitive Programming | 100 |
| Phiếu Giảm Giá | Competitive Programming | 100 |
| Độc Đắc | Competitive Programming | 100 |
| Ghép Hai Dãy | Competitive Programming | 100 |
| Tiền Tố Nhỏ Nhất | Competitive Programming | 100 |
| Xếp Đệm | Competitive Programming | 100 |
| Cây Cầu | Competitive Programming | 100p |
| Truy Vấn Khoảng Cách | Competitive Programming | 100 |
| Đường Đi Bằng Nhau | Competitive Programming | 100 |
| Cạnh Nặng Nhất | Competitive Programming | 100 |
| Tổ Tiên Chung | Competitive Programming | 100 |
| Hệ Thống Tàu Điện | Competitive Programming | 100 |
| Oggy Và Gián | Competitive Programming | 100 |
| Cập Nhật Đường Đi | Competitive Programming | 100 |
| Robot Trên Cây | Competitive Programming | 100 |
| Bộ Ba | Competitive Programming | 100 |
| Bias-Variance Decomposition | Machine Learning | 100 |
| Gini Impurity vs Entropy: Weighted Split Comparison | Machine Learning | 100 |
| Information Gain for a Binary Split | Machine Learning | 100 |
| Information Gain Ratio for a Categorical Feature | Machine Learning | 100 |
| Lasso Soft-Thresholding Update | Machine Learning | 100 |
| Normal Equations for Linear Regression | Machine Learning | 100 |
| Ridge Regression Bias-Variance Decomposition | Machine Learning | 100 |
| ROC AUC and Gini Coefficient | Machine Learning | 100 |
| Bootstrap CI: Standard Error and Confidence Interval | Machine Learning | 100 |
| EM Algorithm for 1D Gaussian Mixture Model | Machine Learning | 100 |
| Polynomial Kernel Matrix | Machine Learning | 100 |
| K-Means WCSS Convergence Trace | Machine Learning | 100 |
| MLE for Multivariate Gaussian Parameters | Machine Learning | 100 |
| PCA via Eigendecomposition of the Covariance Matrix | Machine Learning | 100 |
| Silhouette Score: Per-Point Derivation (1D) | Machine Learning | 100 |
| SVD Low-Rank Approximation Error | Machine Learning | 100 |
| Xâu May Mắn | Competitive Programming | 100 |
| Truy Tìm Kho Báu | Competitive Programming | 100 |
| Cặp Chính Phương | Competitive Programming | 100 |
| Ổn Định | Competitive Programming | 100 |
| Sudoku | Competitive Programming | 100p |
| Chia Kẹo | Competitive Programming | 100 |
| Đồng Xu Kì Diệu | Competitive Programming | 100 |
| Robot Lặn | Competitive Programming | 100 |
| Đếm Tập Con | Competitive Programming | 100 |
| Đường Đi Ma Trận | Competitive Programming | 100 |
| Bài Và Kẹo | Competitive Programming | 100p |
| Số Bar | Competitive Programming | 100 |
| Nguyên Tố Lớn | Competitive Programming | 100 |
| Phân Tích Ước | Competitive Programming | 100 |
| GCD Lớn Nhất | Competitive Programming | 100 |
| Tổng Ước Chung | Competitive Programming | 100 |
| Cặp Đồng Dư | Competitive Programming | 100 |
| Lũy Thừa | Competitive Programming | 100 |
| Sàng Phân Đoạn | Competitive Programming | 100 |
| Sàng Nguyên Tố | Competitive Programming | 100 |
| Phi Hàm Euler | Competitive Programming | 100 |
| XYZ | Competitive Programming | 100 |
| Bức Tường | Competitive Programming | 100p |
| Nút Bấm | Competitive Programming | 100 |
| Dưa Chuột | Competitive Programming | 100 |
| Hàng Rào | Competitive Programming | 100 |
| Cực Tiểu Khoảng Cách | Competitive Programming | 100 |
| Pha Thuốc | Competitive Programming | 100 |
| Du Lịch | Competitive Programming | 100p |
| Robot Giao Hàng | Competitive Programming | 100p |
| Mê Cung | Competitive Programming | 100p |
| Sơn Tường | Competitive Programming | 100p |
| Cặp Số | Competitive Programming | 100p |
| Nông Trại | Competitive Programming | 100p |
| Xe Tăng | Competitive Programming | 100p |
| Hành Trình An Toàn | Competitive Programming | 100p |
| Hội Chợ Trò Chơi | Competitive Programming | 100p |
| Nâng Cấp Đường | Competitive Programming | 100p |
| Bức Tường | Competitive Programming | 100p |
| Pha Thuốc 2 | Competitive Programming | 100 |
| Pha Thuốc 3 | Competitive Programming | 100 |
| Pha Thuốc 4 | Competitive Programming | 100 |
| Chọn Số | Competitive Programming | 100 |
| Chỉ Số | Competitive Programming | 100 |
| Trộn Mảng | Competitive Programming | 100 |
| Ma Trận Con | Competitive Programming | 100 |
| Ba Dãy Số | Competitive Programming | 100 |
| Confusion Matrix Scores | Machine Learning | 100 |
| Precision, Recall, F1 from Counts | Machine Learning | 100 |
| Rolling Mean and Standard Deviation | Machine Learning | 100 |
| Rolling Z-Score | Machine Learning | 100 |
| Threshold Sweep Grid | Machine Learning | 100 |
| Z-Score Standardize | Machine Learning | 100 |
| Sliding Window Minimum | Machine Learning | 100 |
| Merge Anomaly Windows | Machine Learning | 100 |
| Sliding Window Maximum | Machine Learning | 100 |
| Degrees of Freedom: ddof=0 vs ddof=1 | Machine Learning | 100 |
| Mean vs Median Under Skew | Machine Learning | 100 |
| Percentile Estimator: p50, p95, p99 | Machine Learning | 100 |
| Precision-Recall Tradeoff: Best Threshold | Machine Learning | 100 |
| Event-Count Matrix | Machine Learning | 100 |
| GroupBy Log Aggregation | Machine Learning | 100 |
| Missing Value Imputation Strategy | Machine Learning | 100 |
| Out-of-Fold Target Encoder | Machine Learning | 100 |
| Leaky vs Correct Scaling Pipeline | Machine Learning | 100 |
| Leave-One-Out Target Encoder | Machine Learning | 100 |
| Merge Intervals | Machine Learning | 100 |
| Sliding Window Maximum | Machine Learning | 100 |
| Top K Frequent | Machine Learning | 100 |
| Entropy Feature for Log Blocks | Machine Learning | 100 |
| Target Encoding Leakage Quantification | Machine Learning | 100 |
| Mutual Information: Event Type vs Anomaly Label | Machine Learning | 100 |
| L2 Regularization Path | Machine Learning | 100 |
| Logistic Regression via Gradient Descent | Machine Learning | 100 |
| Bootstrap Confidence Interval | Machine Learning | 100 |
| PCA via SVD | Machine Learning | 100 |
| Union-Find with Path Compression | Machine Learning | 100 |