原文链接: https://leetcode-cn.com/problems/queries-on-a-permutation-with-key
英文原文
Given the array queries of positive integers between 1 and m, you have to process all queries[i] (from i=0 to i=queries.length-1) according to the following rules:
- In the beginning, you have the permutation
P=[1,2,3,...,m]. - For the current
i, find the position ofqueries[i]in the permutationP(indexing from 0) and then move this at the beginning of the permutationP.Notice that the position ofqueries[i]inPis the result forqueries[i].
Return an array containing the result for the given queries.
Example 1:
Input: queries = [3,1,2,1], m = 5 Output: [2,1,2,1] Explanation: The queries are processed as follow: For i=0: queries[i]=3, P=[1,2,3,4,5], position of 3 in P is 2, then we move 3 to the beginning of P resulting in P=[3,1,2,4,5]. For i=1: queries[i]=1, P=[3,1,2,4,5], position of 1 in P is 1, then we move 1 to the beginning of P resulting in P=[1,3,2,4,5]. For i=2: queries[i]=2, P=[1,3,2,4,5], position of 2 in P is 2, then we move 2 to the beginning of P resulting in P=[2,1,3,4,5]. For i=3: queries[i]=1, P=[2,1,3,4,5], position of 1 in P is 1, then we move 1 to the beginning of P resulting in P=[1,2,3,4,5]. Therefore, the array containing the result is [2,1,2,1].
Example 2:
Input: queries = [4,1,2,2], m = 4 Output: [3,1,2,0]
Example 3:
Input: queries = [7,5,5,8,3], m = 8 Output: [6,5,0,7,5]
Constraints:
1 <= m <= 10^31 <= queries.length <= m1 <= queries[i] <= m
中文题目
给你一个待查数组 queries ,数组中的元素为 1 到 m 之间的正整数。 请你根据以下规则处理所有待查项 queries[i](从 i=0 到 i=queries.length-1):
- 一开始,排列
P=[1,2,3,...,m]。 - 对于当前的
i,请你找出待查项queries[i]在排列P中的位置(下标从 0 开始),然后将其从原位置移动到排列P的起始位置(即下标为 0 处)。注意,queries[i]在P中的位置就是queries[i]的查询结果。
请你以数组形式返回待查数组 queries 的查询结果。
示例 1:
输入:queries = [3,1,2,1], m = 5 输出:[2,1,2,1] 解释:待查数组 queries 处理如下: 对于 i=0: queries[i]=3, P=[1,2,3,4,5], 3 在 P 中的位置是 2,接着我们把 3 移动到 P 的起始位置,得到 P=[3,1,2,4,5] 。 对于 i=1: queries[i]=1, P=[3,1,2,4,5], 1 在 P 中的位置是 1,接着我们把 1 移动到 P 的起始位置,得到 P=[1,3,2,4,5] 。 对于 i=2: queries[i]=2, P=[1,3,2,4,5], 2 在 P 中的位置是 2,接着我们把 2 移动到 P 的起始位置,得到 P=[2,1,3,4,5] 。 对于 i=3: queries[i]=1, P=[2,1,3,4,5], 1 在 P 中的位置是 1,接着我们把 1 移动到 P 的起始位置,得到 P=[1,2,3,4,5] 。 因此,返回的结果数组为 [2,1,2,1] 。
示例 2:
输入:queries = [4,1,2,2], m = 4 输出:[3,1,2,0]
示例 3:
输入:queries = [7,5,5,8,3], m = 8 输出:[6,5,0,7,5]
提示:
1 <= m <= 10^31 <= queries.length <= m1 <= queries[i] <= m
通过代码
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解题思路
此处撰写解题思路
代码
class Solution {
public int[] processQueries(int[] queries, int m) {
LinkedList<Integer> linkedList=new LinkedList<>();
int[] a=new int[queries.length];
for(int i=1;i<=m;i++){
linkedList.add(i);
}
int mz=0;
for(int i=0;i<queries.length;i++){
if(linkedList.contains(queries[i])){
a[i]=linkedList.indexOf(queries[i]);
linkedList.remove((Integer) queries[i]);
linkedList.addFirst(queries[i]);
}
}
return a;
}
}
统计信息
| 通过次数 | 提交次数 | AC比率 |
|---|---|---|
| 8392 | 10394 | 80.7% |
提交历史
| 提交时间 | 提交结果 | 执行时间 | 内存消耗 | 语言 |
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