数组·结合·divide·conquer 模式
2 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
- Candidate demonstrates an understanding of subset sum problems.
- Candidate leverages sorting to help identify key elements.
- Look for a divide-and-conquer approach instead of iterative filling.
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
- Confusing the order of subset sums and the actual array elements.
- Failing to properly offset integer ranges leads to duplicate numbers.