#include <iostream>

#include <cmath>

#include <random>

using namespace std;

bool check(double x0, double y0, double R, double x, double y){

   return abs(x0 - x) <= R + 1e-5 && abs(y0 - y) <= R + 1e-5;

}

double dist(double x0, double y0, double x, double y){

   return sqrt(pow(x - x0, 2) + pow(y - y0, 2));

}

signed main(){

   srand(time(NULL));

   double x0, y0, R, x1, y1,x2,y2;

   x0 = rand() / (rand() / 1.5);

   y0 = rand() / (rand() / 1.5);

   R  = rand() / (rand() / 1.5);

   cin >> x1 >> y1;

   if(!check(x0,y0,R,x1,y1))

       cout << "Your point is outside. Try again\n";

   cin >> x2 >> y2;

   while(!check(x0,y0,R,x2,y2)){

       dist(x0,y0,x2,y2) < dist(x0,y0,x1,y1) ? cout << "Nearer than last time but it's outside yet. Try again\n" : cout << "Even not nearer than last time. Try again\n";

       x1 = x2;

       y1 = y2;

       cin >> x2 >> y2;

   }

   cout << "Congratulations! Your point is inside now!";

}