# Info & Summary

• Date: 2024-08-24
• Completion Status: A ✅ / B ✅ / C ✅ / D ✅ / E ❌ / F ❌ / G ❌
• Problem Type:

Problem	Type(s)	Data Structure / Algo	🔥 Key Insight / Mark
D	Tree-pruning	BFS/Tree DP	⭐🔥🧠
E	difference‐constraints	Time‐Sweep	🧠🌀
F	Grundy number	Grundy number(ABC255-G)	🌀
G	Math	Segment Tree	🌀