滑动窗口是数组与字符串算法中的高频技巧,本质是利用双指针维护连续区间,并通过增量更新代替重复计算。从固定长度窗口的求和与最值,到可变窗口解决无重复最长子串、最小覆盖子串等约束问题,其核心都在于复用已有结果、精准控制左右边界。进阶场景中,单调队列以 O (n) 复杂度高效 ...
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