#include <iostream>#include <cstdlib>#include <cstring>#include <cstdio>#include <cmath>using namespace std;#define eps 1.0E-8double xx1,xx2,yy1,yy2;double dist(double x1, double y1, double x2, double y2){ double x = abs(x1 - x2); double y = abs(y1 - y2); return sqrt(x * x + y * y);}bool ok(double x, double y){ double d1 = dist(xx1, yy1, x, y); double d2 = dist(xx2, yy2, x, y); if (d1 * 2 + eps < d2) return true; return false;}int main(){ scanf("%lf%lf%lf%lf", &xx1, &yy1, &xx2, &yy2); double x, y; while (scanf("%lf%lf", &x, &y) != EOF) { if (ok(x, y)) { printf("The gopher can escape through the hole at (%.3f,%.3f).n", x, y); return 0; } } printf("The gopher cannot escape.n"); return 0;}
