原题链接:http://poj.org/problem?id=1862 简单题,贪心+优先队列主要练习一下stl大根堆 写了几种实现方式写成类的形式还是要慢一些... 手打的heap: 1: #include<cstdio> #include<cstdlib> #include<cmath> #include<iostream> class Solution{ public: ; int sz; double heap[Max_N]; inline void…

题目链接: PKU:http://poj.org/problem?id=1862 ZJU:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemId=543 Description Our chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian -…

http://poj.org/problem?id=1862 题目大意: 有一种生物能两两合并,合并之前的重量分别为m1和m2,合并之后变为2*sqrt(m1*m2),现在给定n个这样的生物,求合并成一个的最小重量 思路: m1+m2 >=  2*sqrt(m1*m2) 所以每次取大的去合并,能变小. 直接优先队列就可以啦. #include<cstdio> #include<cmath> #include<queue> using namespace std;…

题目描述:http://poj.org/problem?id=1862 题目大意:你有n个数要合并,每两个数x,y合并后得到2*sqrt(x*y).求最后留下的一个数的最小值. 每合并一次,就会有数被开方,那么你越早合并的数被开放的次数越多,于是每次把最大的两个数合并即可.用到优先队列. 代码: #include<cstdio> #include<queue> #include<cmath> using namespace std; priority_queue<…

#include <iostream> #include <algorithm> #include <iomanip> #include <cmath> #define MAXN 100 using namespace std; double _m[MAXN]; double fun(); int n; int main() { //freopen("acm.acm","r",stdin); int i; cin>…

Stripies Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 14151   Accepted: 6628 Description Our chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian - polosatiki, bu…

(-￣▽￣)-* #include<iostream> #include<cstdio> #include<cmath> #include<algorithm> using namespace std; int main() { int n; ]; while(~scanf("%d",&n)) { ;i<n;i++) { int m; scanf("%d",&m); w[i]=m*1.0; } s…

每次合并最大的两个,优先级队列维护一下. 输出的时候%.3lf G++会WA,C++能AC,改成%.3f,都能AC. #include<cstdio> #include<cstring> #include<cmath> #include<queue> #include<algorithm> using namespace std; int n,s; priority_queue<double>Q; int main() { while…

题意:科学家发现一种奇怪的东西,他们有重量weight,如果他们碰在一起,总重变成2*sqrt(m1*m2).要求出最终的重量的最小值. 思路:每次选取质量m最大的两个stripy进行碰撞结合,能够得到最小的质量.所有只要维护一个优先队列就可以了 #include <iostream> #include <cstdio> #include <queue> #include <math.h> #include <cstring> #include…

Stripies Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 10263   Accepted: 4971 Description Our chemical biologists have invented a new very useful form of life called stripies (in fact, they were first called in Russian - polosatiki, bu…