查找·stores·inventory·imbalance·core·interview·pattern 模式
1 道题目
模式页适合用来建立可复用解题框架。先识别题目特征，再按固定流程解释状态定义、转移和边界。
识别信号
- They want you to recognize a per-group boundary comparison, not a global cheapest-versus-expensive check.
- They are testing whether you can preserve row-level quantity after aggregating price by store.
解题流程
- 1. 明确窗口/状态定义
- 2. 更新状态并维护约束
- 3. 用边界样例验证
常见失分点
- Comparing the minimum quantity and maximum quantity instead of the quantity attached to the minimum and maximum price.