#include <bits/stdc++.h>
using namespace std;
//#define OPENIOBUF

namespace FastIO
{

class FastIOBase
{
 protected:
#ifdef OPENIOBUF
	static const int BUFSIZE=1<<22;
	char buf[BUFSIZE+1];
	int buf_p=0;
#endif
	FILE *target;
 public:
#ifdef OPENIOBUF
	virtual void flush()=0;
#endif
	FastIOBase(FILE *f): target(f){}
	~FastIOBase()=default;
};

class FastOutput: public FastIOBase
{
#ifdef OPENIOBUF
 public:
	inline void flush()
		{ fwrite(buf,1,buf_p,target),buf_p=0; }
#endif
 protected:
	inline void __putc(char x)
	{
#ifdef OPENIOBUF
		if(buf[buf_p++]=x,buf_p==BUFSIZE)flush();
#else
		putc(x,target);
#endif
	}
	template<typename T>
	inline void __write(T x)
	{
		static char stk[64],*top;top=stk;
		if(x<0) return __putc('-'),__write(-x);
		do *(top++)=x%10,x/=10; while(x);
		for(;top!=stk;__putc(*(--top)+'0'));
	}
 public:
	FastOutput(FILE *f=stdout): FastIOBase(f){}
#ifdef OPENIOBUF
	inline void setTarget(FILE *f) { this->flush(),target=f; }
	~FastOutput(){ flush(); }
#else
	inline void setTarget(FILE *f) { target=f; }
#endif
	template<typename ...T>
	inline void writesp(const T &...x)
		{ initializer_list<int>{(this->operator<<(x),__putc(' '),0)...}; }
	template<typename ...T>
	inline void writeln(const T &...x)
		{ initializer_list<int>{(this->operator<<(x),__putc('\n'),0)...}; }
	inline FastOutput &operator <<(char x)
		{ return __putc(x),*this; }
	inline FastOutput &operator <<(const char *s)
		{ for(;*s;__putc(*(s++)));return *this; }
	inline FastOutput &operator <<(const string &s)
		{ return (*this)<<s.c_str(); }
	template<typename T,typename=typename enable_if<is_integral<T>::value>::type>
	inline FastOutput &operator <<(const T &x)
		{ return __write(x),*this; }
}qout;

class FastInput: public FastIOBase
{
#ifdef OPENIOBUF
 public:
	inline void flush()
		{ buf[fread(buf,1,BUFSIZE,target)]='\0',buf_p=0; }
#endif
 protected:
	inline char __getc()
	{
#ifdef OPENIOBUF
		if(buf_p==BUFSIZE) flush();
		return buf[buf_p++];
#else
		return getc(target);
#endif
	}
 public:
#ifdef OPENIOBUF
	FastInput(FILE *f=stdin): FastIOBase(f){ buf_p=BUFSIZE; }
	inline void setTarget(FILE *f) { this->flush(),target=f; }
#else
	FastInput(FILE *f=stdin): FastIOBase(f){}
	inline void setTarget(FILE *f) { target=f; }
#endif
	inline char getchar() { return __getc(); }
	template<typename ...T>
	inline void read(T &...x)
		{ initializer_list<int>{(this->operator>>(x),0)...}; }
	inline FastInput &operator >>(char &x)
		{ while(isspace(x=__getc()));return *this; }
	template<typename T,typename=typename enable_if<is_integral<T>::value>::type>
	inline FastInput &operator >>(T &x)
	{
		static char ch,sym;x=sym=0;
		while(isspace(ch=__getc()));
		if(ch=='-') sym=1,ch=__getc();
		for(;isdigit(ch);x=(x<<1)+(x<<3)+(ch^48),ch=__getc());
		return sym?x=-x:x,*this;
	}
	inline FastInput &operator >>(char *s)
	{
		while(isspace(*s=__getc()));
		for(;!isspace(*s) && *s && ~*s;*(++s)=__getc());
		return *s='\0',*this;
	}
	inline FastInput &operator >>(string &s)
	{
		char str_buf[(1<<8)+1],*p=str_buf;
		char *const buf_end=str_buf+(1<<8);
		while(isspace(*p=__getc()));
		for(s.clear(),p++;;p=str_buf)
		{
			for(;p!=buf_end && !isspace(*p=__getc()) && *p && ~*p;p++);
			*p='\0',s.append(str_buf);
			if(p!=buf_end) break;
		}
		return *this;
	}
}qin;

} // namespace FastIO
using namespace FastIO;

using LL=long long;
using LD=long double;
using UI=unsigned int;
using ULL=unsigned long long;

#ifndef DADALZY
#define FILEIO(file) freopen(file".in","r",stdin),freopen(file".out","w",stdout)
#else
#define FILEIO(file)
#endif

template<typename T>
struct Vector
{
	T x,y;
	bool ban;
	Vector(): x(0),y(0){}
	Vector(T _x,T _y,bool _ban=false): x(_x),y(_y),ban(_ban){}
	inline Vector &operator +=(const Vector &rhs)
		{ return x+=rhs.x,y+=rhs.y,*this; }
	inline Vector &operator -=(const Vector &rhs)
		{ return x-=rhs.x,y-=rhs.y,*this; }
	inline Vector &operator *=(T scale)
		{ return x*=scale,y*=scale,*this; }
	inline Vector operator +(const Vector &rhs)const
		{ return Vector(*this)+=rhs; }
	inline Vector operator -(const Vector &rhs)const
		{ return Vector(*this)-=rhs; }
	inline T operator *(const Vector &rhs)const
		{ return x*rhs.y-y*rhs.x; }
	inline T operator %(const Vector &rhs)const
		{ return x*rhs.x-y*rhs.y; }
	friend inline Vector operator *(T scale,const Vector &u)
		{ return Vector(u)*=scale; }
	friend inline Vector operator *(const Vector &u,T scale)
		{ return Vector(u)*=scale; }
	inline bool operator <(const Vector &rhs)const
		{ return x!=rhs.x?x<rhs.x:y<rhs.y; }
	inline bool operator ==(const Vector &rhs)const
		{ return x==rhs.x && y==rhs.y; }
	inline bool operator !=(const Vector &rhs)const
		{ return x!=rhs.x || y!=rhs.y; }
	friend inline auto abs(const Vector &u)
		{ return hypot(u.x,u.y); }
	friend inline auto abs2(const Vector &u)
		{ return u.x*u.x+u.y*u.y; }
	friend inline auto arg(const Vector &u)
		{ return atan2(u.y,u.x); }
	friend inline Vector rotate(const Vector &u,T t)
		{ return Vector(u.x*cos(t)-u.y*sin(t),u.x*sin(t)+u.y*cos(t),u.id); }
};
using Vec=Vector<LL>;

int n1,n2;
Vec p1[55],p2[55]; // 1: inner, 2: outer

inline bool inside(const Vec &p,const array<Vec,3> &T)
{
	LL val1=(p-T[0])*(T[1]-T[0]),
	   val2=(p-T[1])*(T[2]-T[1]),
	   val3=(p-T[2])*(T[0]-T[2]);
	bool res=false;
	res|=(val1<0 && val2<0 && val3<0);
	res|=(val1>0 && val2>0 && val3>0);
	return res;
}
vector<Vec> convex(vector<Vec> p)
{
	if(p.size()<=1) return p;
	int N=p.size(),M=0;
	Vec O=p[0];
	sort(p.begin()+1,p.end(),[&O](const Vec &u,const Vec &v)
	{
		LL x=(u-O)*(v-O);
		if(x) return x>0;
		return abs2(u-O)<abs2(v-O);
	});
	for(int i=1;i<N;i++)
	{
		while(M && (p[i]-p[M-1])*(p[M]-p[M-1])>=0) M--;
		p[++M]=p[i];
	}
	return p.resize(M+1),p;
}
double solve()
{
	vector<Vec> p(p1+1,p1+n1+1);
	while(true)
	{
		int sz=p.size();
		auto pre=[sz](int i){ return (i?i:sz)-1; };
		bool nothing=true;
		for(int i=0;i<sz;i++)
		{
			int pi=pre(i),ppi=pre(pi);
			Vec A=p[i],B=p[pi],C=p[ppi];
			if(B.ban || (A-C)*(B-C)<0) continue;
			vector<Vec> np{C};
			for(int j=1;j<=n2;j++) if(inside(p2[j],{A,B,C})) np.push_back(p2[j]);
			for(int j=0;j<sz;j++) if(inside(p[j],{A,B,C})) np.push_back(p[j]);
			np.push_back(A);
			np=convex(np),reverse(np.begin()+2,np.end());
			for(auto &j: np) j.ban=true;
			p.erase(p.begin()+pi);
			p.insert(p.begin()+i-(pi<i),np.begin()+2,np.end());
			nothing=false;break;
		}
		if(nothing) break;
	}
	double res=abs(p[0]-p.back());
	for(int i=1;i<p.size();i++) res+=abs(p[i-1]-p[i]);
	return res;
}
int main()
{
	qin>>n1;
	for(int i=1;i<=n1;i++) qin>>p1[i].x>>p1[i].y;
	qin>>n2;
	for(int i=1;i<=n2;i++) qin>>p2[i].x>>p2[i].y;
	double ans=solve();
	cout<<setprecision(8)<<fixed<<ans;
	return 0;
}