Black Box Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 7099   Accepted: 2888 Description Our Black Box represents a primitive database. It can save an integer array and has a special i variable. At the initial moment Black Box is empt…

题目: http://poj.org/problem?id=1442 开始用二叉排序树写的,TLE了,改成优先队列,过了.. 两个版本都贴一下吧,赚稿费.. #include <stdio.h> #include <queue> #include <vector> using namespace std; priority_queue<int>qmax; priority_queue<int, vector<int>, greater<…

题目来源:POJ 1442 Black Box 题意:输入xi 输出前xi个数的第i大的数 思路:试了下自己的treap模版 #include <cstdio> #include <cstring> #include <cstdlib> #include <ctime> using namespace std; struct Node { Node *ch[2]; int r; int v; int s; Node(){} Node(int v): v(v)…

题目地址:POJ 1442 这题是用了两个优先队列,当中一个是较大优先.还有一个是较小优先. 让较大优先的队列保持k个.每次输出较大优先队列的队头. 每次取出一个数之后,都要先进行推断,假设这个数比較大优先的队列的队头要小,就让它增加这个队列.队列头移到较小优先的队列中.然后当较大优先的数不足k个的时候,就让较小优先的队列的队头移到较大优先的队头中. 代码例如以下. #include <iostream> #include <cstdio> #include <string&…

题目:http://poj.org/problem?id=1442 题意:n,m,分别是a数组,u数组的个数,u[i]w为几,就加到a几,然后输出第i 小的 刚开始用了一个小顶堆,超时,后来看了看别人的 代码,很巧妙的设计 #include<stdio.h> #include<queue> using namespace std; ]; int main() { int n,i,m,j,u; priority_queue< int,vector<int>,less…

题目链接:http://poj.org/problem?id=1442 思路分析: <1>维护一个最小堆与最大堆,最大堆中存储最小的K个数,其余存储在最小堆中; <2>使用Treap构造名次树,查询第K大数即可; 代码如下(堆的用法): #include<iostream> #include<queue> using namespace std; struct cmp1 { bool operator() ( const int a, const int b…

优先队列..刚开始用蠢办法,经过一个vector容器中转,这么一来一回这么多趟,肯定超时啊. 超时代码如下: #include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <cstdlib> #include <string> #include <vector> #i…

Black Box Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 10658   Accepted: 4390 Description Our Black Box represents a primitive database. It can save an integer array and has a special i variable. At the initial moment Black Box is emp…

给n个数,依次按顺序插入,第二行m个数,a[i]=b表示在第b次插入后输出第i小的数 *解法:写两个优先队列,q1里由大到小排,q2由小到大排,保持q2中有i-1个元素,那么第i小的元素就是q2的top 而且注意到每次输出第i小的数i都是递增的 #include <iostream> #include <cstdio> #include <cstdlib> #include <cstring> #include <queue> #include…

For this problem, you will write a program that reads in a sequence of 32-bit signed integers. After each odd-indexed value is read, output the median (middle value) of the elements received so far. Input The first line of input contains a single int…