#include <fstream>
#include <iostream>
#include <iomanip>
#include <string>
#include <math.h>

using namespace std;
struct point {
	double x;
	double y;
	double z;

};

double distance(point a, point b) {
	return sqrt((a.x - b.x)*(a.x - b.x) +
		(a.y - b.y)*(a.y - b.y) + (a.z - b.z)*(a.z - b.z));
}


int main() {
	int r;
	point p[30];
	int count;
	cout << "Vvedite tochki < 30";
	cin >> count;
	for (int i = 0; i < count; ++i) {
		cin >> p[i].x >> p[i].y >> p[i].z;
	}
	cout << "Radius";
	cin >> r;
	int n = 0, max=0, imax,k=0;
	for (int i = 0; i < count; i++) {
		for (int j = 0; j<count; j++) {

			if (j != i) {
				if (distance(p[i], p[j])<=r) {
					k++;
				}
			}

		}

		if (i == 0) {
			max = k;
			imax = i;
		}
		else if (max < k){
			max = k;
			imax = i;
		}
		k = 0;
	}
	if (max == 0) {
		cout << "to4ek net";
	}
	else {
		cout << "Centre: x = " << p[imax].x << ", y = " << p[imax].y << ", z = " << p[imax].z;
		cout << endl << "to4ki v oblasti = " << max;
	}

	system("pause");
}