SRM 438 D2 500 FeudaliasBattle

#include <algorithm>
#include <iostream>
#include <sstream>
#include <string>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cmath>
using namespace std;
typedef long long LL;
#define FOR(k,a,b) for(int k(a); k < (b); ++k)
#define REP(k,a) for(int k=0; k < (a); ++k)


class FeudaliasBattle {
    vector<int> mBX,mBY,mSX,mSY;
    double mTOT,mRT,mMS;
    double dist(double x1, double y1, double x2, double y2)
    {
        return sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
    }
    double destroyS(int b, int s)
    {
        double res=mTOT;
        res+=dist(mBX[b],mBY[b],mSX[s],mSY[s])/mMS;
        return res;
    }
    double destroyD(int b)
    {
        double res,res2,res3,res4;
        res=mTOT+dist(mBX[0],mBY[0],mSX[b],mSY[b])/mMS;
        res2=2*mTOT+mRT+dist(mBX[1],mBY[1],mSX[b],mSY[b])/mMS;
        res3=mTOT+dist(mBX[1],mBY[1],mSX[b],mSY[b])/mMS;
        res4=2*mTOT+mRT+dist(mBX[0],mBY[0],mSX[b],mSY[b])/mMS;
        return min(max(res,res2),max(res3,res4));
    }
public:
    double getMinimumTime(vector <int> baseX, vector <int> baseY, vector <int> siloX, vector <int> siloY, int takeOffTime, int rechargeTime, int missileSpeed) {
        mBX=baseX,mBY=baseY,mSX=siloX,mSY=siloY;
        mTOT=takeOffTime/60.0,mRT=rechargeTime,mMS=missileSpeed;
        double res=destroyD(0);
        res=min(res,destroyD(1));
        REP(i,2)
        {
            res=min(res,max(destroyS(i,0),destroyS(1-i,1)));
            res=min(res,max(destroyS(1-i,0),destroyS(i,1)));
        }
        return res;
    }

};