1 #include<iostream>
2 #include<iomanip>
3 using namespace std;
4
5 int main()
6 {
7 //freopen("acm.acm","r",stdin);
8 double x1;
9 double y1;
10 double x2;
11 double y2;
12 double hol_x;
13 double hol_y;
14 double len_gop;
15 double len_dog;
16 bool boo = false;
17 cin>>x1>>y1>>x2>>y2;
18 while(cin>>hol_x>>hol_y)
19 {
20 len_gop = (x1-hol_x)*(x1-hol_x) + (y1-hol_y)*(y1-hol_y);
21 len_dog = (x2-hol_x)*(x2-hol_x) + (y2-hol_y)*(y2-hol_y);
22 if(len_dog/4.000 > len_gop)
23 {
24 cout<<"The gopher can escape through the hole at ("<<setiosflags(ios::fixed)<<setprecision(3)<<hol_x<<","<<hol_y<<")."<<endl;
25 boo = true;
26 break;
27 }
28 }
29 if(!boo)
30 cout<<"The gopher cannot escape."<<endl;
31 }
