From a963ea7f830b9b6b5ef09ae3daaa3eefd184f4b9 Mon Sep 17 00:00:00 2001 From: CyC2018 Date: Wed, 4 Nov 2020 02:11:50 +0800 Subject: [PATCH] auto commit --- docs/notes/59. 滑动窗口的最大值.md | 10 +++++++++- notes/59. 滑动窗口的最大值.md | 10 +++++++++- notes/pics/image-20201104020702453.png | Bin 0 -> 12390 bytes 3 files changed, 18 insertions(+), 2 deletions(-) create mode 100644 notes/pics/image-20201104020702453.png diff --git a/docs/notes/59. 滑动窗口的最大值.md b/docs/notes/59. 滑动窗口的最大值.md index a13b5ba3..641b3668 100644 --- a/docs/notes/59. 滑动窗口的最大值.md +++ b/docs/notes/59. 滑动窗口的最大值.md @@ -1,6 +1,8 @@ # 59. 滑动窗口的最大值 -[NowCoder](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github) +## 题目链接 + +[牛客网](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github) ## 题目描述 @@ -8,8 +10,14 @@ 例如，如果输入数组 {2, 3, 4, 2, 6, 2, 5, 1} 及滑动窗口的大小 3，那么一共存在 6 个滑动窗口，他们的最大值分别为 {4, 4, 6, 6, 6, 5}。 +
image-20201104020702453

+ ## 解题思路 +维护一个大小为窗口大小的大顶堆，顶堆元素则为当前窗口的最大值。 + +假设窗口的大小为 M，数组的长度为 N。在窗口向右移动时，需要先在堆中删除离开窗口的元素，并将新到达的元素添加到堆中，这两个操作的时间复杂度都为 log2M，因此算法的时间复杂度为 O(Nlog2M)，空间复杂度为 O(M)。 + ```java public ArrayList maxInWindows(int[] num, int size) { ArrayList ret = new ArrayList<>(); diff --git a/notes/59. 滑动窗口的最大值.md b/notes/59. 滑动窗口的最大值.md index a13b5ba3..641b3668 100644 --- a/notes/59. 滑动窗口的最大值.md +++ b/notes/59. 滑动窗口的最大值.md @@ -1,6 +1,8 @@ # 59. 滑动窗口的最大值 -[NowCoder](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github) +## 题目链接 + +[牛客网](https://www.nowcoder.com/practice/1624bc35a45c42c0bc17d17fa0cba788?tpId=13&tqId=11217&tPage=1&rp=1&ru=/ta/coding-interviews&qru=/ta/coding-interviews/question-ranking&from=cyc_github) ## 题目描述 @@ -8,8 +10,14 @@ 例如，如果输入数组 {2, 3, 4, 2, 6, 2, 5, 1} 及滑动窗口的大小 3，那么一共存在 6 个滑动窗口，他们的最大值分别为 {4, 4, 6, 6, 6, 5}。 +
image-20201104020702453

+ ## 解题思路 +维护一个大小为窗口大小的大顶堆，顶堆元素则为当前窗口的最大值。 + +假设窗口的大小为 M，数组的长度为 N。在窗口向右移动时，需要先在堆中删除离开窗口的元素，并将新到达的元素添加到堆中，这两个操作的时间复杂度都为 log2M，因此算法的时间复杂度为 O(Nlog2M)，空间复杂度为 O(M)。 + ```java public ArrayList maxInWindows(int[] num, int size) { ArrayList ret = new ArrayList<>(); diff --git a/notes/pics/image-20201104020702453.png b/notes/pics/image-20201104020702453.png new file mode 100644 index 0000000000000000000000000000000000000000..81ee0ec442304a4a2143e59b2356b0873838cbec GIT binary patch literal 12390 zcmeHtc{r5s+qV++RcS?8D@(TcmYq<_o+bM_D6$)2&{!r)Dn+uDvSk@FgRx{Z7(^mM zOf%A0vW{JY!C1y~P2b=19`7ITd;H#i-s5@S<9Lo^xX10juj{@hUaNUB9ZSNQx+n%@soZ!xf&Gaj5Y-iXEuV1waf4eYr&#z!Tipnq>3ahZY zTsKg9r%H-`wzvCptXRIAao|Z;b#{G$*0rYmk2K)X+!&zb^UBZ5_LcuZIC>l&~=U>`eupm z8^VevMb0qOHX|XU=@AXu@%|JXkc`bw3OTbET<;G(KEn;Jr>-2`4=#t!JZ1+M&ZD39 zfD8Kpuokxad-mN0mnODYRd8`-yDA7Sf8YP_*Z!!aob$^}iTj%}pv*zT17l766PCJN z&n~q4*cBNA9floK?HW=w0a98SWCxJ6c#gMrwf9_U>M``xO17`+u5u*rtA{%!QY_)t+Qy zD{ndaDMpzj4HK7>FSaPj{4?5_eRo~i?G76&+%}wisr%1pv1hpbPC6QiS311<+Kzjz z0?Zze2=0~Z6cxPgE#Qao?gD{T^p5UVzFKW%IksGnp3Iy99^Is@3+@@_2Y62zS+x2M zgh&B55IFak{Y^X0zssy3E&I!B)~tRCVAg}~d|a7A#vQk4B5Z8mbdK)F8Q{&W!Ckaj~ok?_b?_x9P>|4bznq-mI5gGr(k= zJXIcDPHul*5sg)KwW}U<*hYRD(+0|u;C{2zT9bx>p1+a7c1@5wek>xN3%2hDOWQa$ z(Xl3FHwundLIEuPk5wFj_xdT|-ES)78`>Y9dd|)kcwY1|JH@=v4u~4-lUDm@-4bWP zJu3p)e5@nZi1GBFdmut6ulxrx>oP6wXhHv2;3Kd*_lwtEz5$oTDet}<17_y}i@KH? 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