Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements.    Your algorithm's time complexity must be…

2007/2008 ACM International Collegiate Programming Contest University of Ulm Local Contest Problem F: Frequent values You are given a sequence of n integers a1 , a2 , ... , an in non-decreasing order. In addition to that, you are given several querie…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. 其实最简单的就是想到就是用一个小顶堆实现,如果堆中元素个数小于K,则插入元素,如果大于K,则和堆顶比较,如果大于堆顶,则弹出堆顶,插入新元素. 自己实现红黑树有点难,好在C++ STL容器中,map,set和priority_queue都…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. public class Solution { //桶排序 public List<In…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: You may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's time complexity must be bet…

/************************************************************ 题目: Frequent values(poj 3368) 链接: http://poj.org/problem?id=3368 题意: 给出n个数和Q个询问(l,r),对于每个询问求出(l,r)之 间连续出现次数最多的次数 算法: RMQ 思路: 借助数组f[i].表示第i位前面有f[i]个相同的数.对于 每个区间(l,r).暴力求前面几个相同的数.然后在用RMQ 求后面…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. 分析: http://blog.csdn.net/itismelzp/article/details/51451374 bucket sort, 出现次数作为被sort的对象. public class Solution { public…

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=2132 The Most Frequent Number Time Limit: 5 Seconds      Memory Limit: 1024 KB Seven (actually six) problems may be somewhat few for a contest. But I am really unable to devise another prob…

Given a non-empty array of integers, return the k most frequent elements. For example,Given [1,1,1,2,2,3] and k = 2, return [1,2]. Note: 347. Top K Frequent ElementsYou may assume k is always valid, 1 ≤ k ≤ number of unique elements. Your algorithm's…

Problem F: Frequent values You are given a sequence of n integers a1 , a2 , ... , an in non-decreasing order. In addition to that, you are given several queries consisting of indices i and j (1 ≤ i ≤ j ≤ n). For each query, determine the most frequen…