frp

#include <fstream>
#include <cmath>
using namespace std;
double sqr(double x){return x*x;}
double len(double x1,double y1,double x2,double y2)
{
	return sqrt(sqr(x2-x1)+sqr(y2-y1));
}

#define eps 1e-4

frp

#include <fstream>
#include <iostream>
#include <cmath>
#include <cstdlib>
#include <array>
using namespace std;

struct point {
    int64_t x, y;
};