比赛 |
顾研NOIP2011模拟赛 |
评测结果 |
AAAAAATTTT |
题目名称 |
超空间电台 |
最终得分 |
60 |
用户昵称 |
Makazeu |
运行时间 |
4.156 s |
代码语言 |
C++ |
内存使用 |
7.87 MiB |
提交时间 |
2012-10-17 20:51:10 |
显示代码纯文本
#include <cstdio>
#include <cstdlib>
#include <set>
#include <cmath>
#include <algorithm>
using namespace std;
const int MAXN=555;
class Star{public:double x,y,z;int stype;}S[MAXN];
set<double> hash;int N;
class Stardist{public:double dist;int stype;};
class Starpoint
{
public:
Stardist pdist[MAXN];
int starnum[MAXN];
}Ad[MAXN];
bool cmp(const Stardist&a,const Stardist&b)
{
return a.dist<b.dist;
}
inline double sqr(double a)
{
return a*a;
}
inline void init()
{
for(int i=1;i<=N;i++)
scanf("%lf %lf %lf %d",&S[i].x,&S[i].y,&S[i].z,&S[i].stype);
double dist;
for(int i=1;i<=N;i++)
{
for(int j=1;j<=N;j++)
{
dist=sqr(S[j].x-S[i].x)+sqr(S[j].y-S[i].y)+sqr(S[j].z-S[i].z);
Ad[i].pdist[j].dist=dist;
Ad[i].pdist[j].stype=S[j].stype;
hash.insert(dist);
}
sort(Ad[i].pdist+1,Ad[i].pdist+1+N,cmp);
Ad[i].starnum[0]=0;
for(int j=1;j<=N;j++)
{
Ad[i].starnum[j]=0;
if(Ad[i].pdist[j].stype==S[i].stype)
Ad[i].starnum[j]=Ad[i].starnum[j-1]+1;
else Ad[i].starnum[j]=Ad[i].starnum[j-1];
}
}
}
inline int binarychop(int k,double dist)
{
int l=0,r=N,mid,res;
while(l<=r)
{
mid=(l+r)/2;
if(Ad[k].pdist[mid].dist<=dist) {res=mid;l=mid+1;continue;}
r=mid-1; continue;
}
return res;
}
inline void work()
{
set<double> :: iterator iter; double nowdist;
int nownum; int MaxNum=0;double MaxDist;
for(iter=hash.begin();iter!=hash.end();iter++)
{
nowdist=*iter; nownum=0;
int fugai,have;
for(int i=1;i<=N;i++)
{
fugai=binarychop(i,nowdist);
have=Ad[i].starnum[fugai];
if(have*2>=fugai) continue;
nownum++;
}
if(nownum>MaxNum)
{
MaxNum=nownum;
MaxDist=nowdist;
}
}
printf("%d\n%.4lf\n",MaxNum,sqrt(MaxDist));
}
int main(int argc, char const *argv[])
{
freopen("hyper.in","r",stdin);
freopen("hyper.out","w",stdout);
scanf("%d\n",&N);
init();
work();
return 0;
}