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Commit867dc31

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‎README.md

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| 50|[Pow(x, n)][050]| Math, Binary Search|
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| 56|[Merge Intervals][056]| Array, Sort|
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| 554|[Brick Wall][554]| Hash Table|
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| 1014|[最佳观光组合][1014]| 数组|
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##Hard
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[050]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/050/README.md
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[056]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/056/README.md
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[554]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/554/README.md
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[1014]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/1014/README.md
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[004]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/004/README.md
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[010]:https://github.com/Blankj/awesome-java-leetcode/blob/master/note/010/README.md

‎note/1014/README.md

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#[最佳观光组合][title]
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##题目描述
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给定正整数数组`A``A[i]` 表示第`i` 个观光景点的评分,并且两个景点`i``j` 之间的距离为`j - i`
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一对景点(`i < j`)组成的观光组合的得分为(`A[i] + A[j] + i - j`):景点的评分之和**减去**它们两者之间的距离。
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返回一对观光景点能取得的最高分。
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**示例:**
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```
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输入:[8,1,5,2,6]
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输出:11
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解释:i = 0, j = 2, A[i] + A[j] + i - j = 8 + 5 + 0 - 2 = 11
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```
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**提示:**
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1.`2 <= A.length <= 50000`
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2.`1 <= A[i] <= 1000`
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**标签:** 数组
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##思路
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直接暴力两层 for 循环肯定过不了关,我们把公式变化为`(A[i] + i) + (A[j] - j)`,看到此应该就可以想到在每次遍历`j` 时,只需要知道`max(A[i] + i)` 即可。
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```java
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classSolution {
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publicintmaxScoreSightseeingPair(int[]A) {
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int ans=0, cur=A[0]+0;
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for (int j=1; j<A.length; j++) {
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ans=Math.max(ans, cur+A[j]- j);// 计算当前最大得分
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cur=Math.max(cur,A[j]+ j);// 更新最大的 A[i] + i
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}
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return ans;
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}
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publicstaticvoidmain(String[]args) {
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Solution solution=newSolution();
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int[]A=newint[]{8,1,5,2,6};
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System.out.println(solution.maxScoreSightseeingPair(A));
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}
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}
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```
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##结语
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如果你同我一样热爱数据结构、算法、LeetCode,可以关注我 GitHub 上的 LeetCode 题解:[awesome-java-leetcode][ajl]
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[title]:https://leetcode-cn.com/problems/best-sightseeing-pair/
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[ajl]:https://github.com/Blankj/awesome-java-leetcode
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packagecom.blankj.medium._1014;
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/**
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* <pre>
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* author: Blankj
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* blog : http://blankj.com
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* time : 2020/06/18
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* desc :
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* </pre>
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*/
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publicclassSolution {
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publicintmaxScoreSightseeingPair(int[]A) {
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intans =0,cur =A[0] +0;
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for (intj =1;j <A.length;j++) {
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ans =Math.max(ans,cur +A[j] -j);// 计算当前最大得分
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cur =Math.max(cur,A[j] +j);// 更新最大的 A[i] + i
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}
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returnans;
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}
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publicstaticvoidmain(String[]args) {
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Solutionsolution =newSolution();
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int[]A =newint[]{8,1,5,2,6};
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System.out.println(solution.maxScoreSightseeingPair(A));
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}
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}

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