位运算·操作·结合·brainteaser 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
- Look for bit-level patterns in num1 that align with powers of 2 subtractions.
- Consider sequences where operations alternate between positive and negative deltas due to num2.
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
- Failing to handle negative intermediate values when subtracting 2^i + num2.