#include<cstdio>#include<cstring>#include<cctype>#include<algorithm>#include<cmath>using namespace std;#define rep(i,s,t) for(int i=s;i<=t;i++)#define dwn(i,s,t) for(int i=s;i>=t;i--)#define clr(x,c) memset(x,c,sizeof(x))int read(){	int x=0,f=1;char c=getchar();	while(!isdigit(c)) {		if(c==‘-‘) f=-1;c=getchar();	}	while(isdigit(c)) x=x*10+c-‘0‘,c=getchar();	return x*f;}const int inf=0x7f7f7f7f;const double eps=1e-3;double au,av,bu,bv,cu,cv,du,dv;double p,q,r;double dis(double a,double b,double x,double y){	return sqrt((x-a)*(x-a)+(y-b)*(y-b));}double cal(double a,double b){	double la=cu,lb=cv,ra=du,rb=dv,xa,ya,xb,yb,ta,tb,orz,tmp;	while(fabs(ra-la)>eps||fabs(rb-lb)>eps){		orz=(ra-la)/3;tmp=(rb-lb)/3;		xa=orz+la,ya=tmp+lb;		xb=orz*2+la,yb=tmp*2+lb;		ta=dis(xa,ya,a,b)/r+dis(xa,ya,du,dv)/q;		tb=dis(xb,yb,a,b)/r+dis(xb,yb,du,dv)/q;		if(ta>tb) la=xa,lb=ya;		else ra=xb,rb=yb;	}	return dis(au,av,a,b)/p+dis(la,lb,a,b)/r+dis(la,lb,du,dv)/q;}int main(){	au=read(),av=read(),bu=read(),bv=read();	cu=read(),cv=read(),du=read(),dv=read();	p=read(),q=read(),r=read();	double la=au,lb=av,ra=bu,rb=bv,xa,ya,xb,yb,ta,tb,orz,tmp;	while(fabs(ra-la)>eps||fabs(rb-lb)>eps){		orz=(ra-la)/3;tmp=(rb-lb)/3;		xa=orz+la,ya=tmp+lb;		xb=orz*2+la,yb=tmp*2+lb;		ta=cal(xa,ya);tb=cal(xb,yb);		if(ta>tb) la=xa,lb=ya;		else ra=xb,rb=yb;	}	printf("%.2lf\n",cal(la,lb));	return 0;}/*0 0 0 100100 0 100 1002 2 1*/

对于100%的数据，1<= Ax，Ay，Bx，By，Cx，Cy，Dx，Dy<=1000
1<=P，Q，R<=10

Day2