# Info & Summary

• Date: 2025-05-03
• Completion Status: A ✅ / B ✅ / C ✅ / D ✅ / E ❌ / F ❌ / G ❌
• Problem Type:

Problem	Type(s)	Data Structure / Algo	🔥 Key Insight / Mark
D	bitmask, DP	bitmask / DP	⭐🔥
E	Minimum number of operations	DP	🧠🔥
F	DP	DP	🌀
G	Linear Programming	Linear Programming	🌀

# Info & Summary

• Date: 2025-04-19
• Completion Status: A ✅ / B ✅ / C ✅ / D ❌ / E ✅ / F ❌ / G ❌
• Problem Type:

Problem	Type(s)	Data Structure / Algo	🔥 Key Insight / Mark
D	Efficient Counting	Math	⭐
E	Expected Value Optimization	DP/Bottom-Up DP/DFS	🔥🧠
F	Path Enumeration	Meet-in-the-Middle/Bitmask	🔥🛠️

# Info & Summary

• Date: 2025-04-13
• Completion Status: A ✅ / B ✅ / C ✅ / D ✅ / E ✅ / F ❌ / G ❌ / H ❌
• Problem Type:

Problem	Type(s)	Data Structure / Algo	🔥 Key Insight / Mark
E	Bitwise operation	Bitmask/Bitwise	🔥⭐
F	Constructive	Constructive/Math	🌀⭐🧠
G	Implementation	Implementation/Math	🌀⚠️
H	Number theory/Math	Number theory/Math/Binary search	🌀⚠️

# Info & Summary

• Date: 2025-03-08
• Completion Status: A ✅ / B ✅ / C ✅ / D ✅ / E ❌ / F ❌ / G ❌
• Problem Type:

Problem	Type(s)	Data Structure / Algo	🔥 Key Insight / Mark
D	XOR operation	DFS	⭐
E	XOR operation	BFS/DFS	🔥🧠
F	Inversion number	Fenwick Tree	🔥🛠️🌀
G	Meet-in-the-Middle	Meet-in-the-Middle/Bitmask	🔥🛠️🌀