滑动窗口最大值c++

下标i一步步走到窗口右，队列下标q.f,q.f+1···q.b记录窗口内元素 num_q.f≥num_q.f+1≥···num_q.b 用q.b≤q.i，q.f≥q.i-size更新q.f和q.b qf压入结果尾

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