#include <iostream>
using namespace std;
bool is_point_in_circle(double x, double y, double xc, double yc, double r);
int main()
{
double x, y, xc, yc, r;
bool result;
cin >> x >> y >> xc >> yc >> r;
result = is_point_in_circle(x, y, xc, yc, r);
if (result) cout << "YES";
else cout << "NO";
return 0;
}
bool is_point_in_circle(double x, double y, double xc, double yc, double r)
{
if ((x - xc) * (x - xc) + (y - yc) * (y - yc) < r * r) return true;
return false;
}
#include <iostream>
#include <math.h>
using namespace std;
void triangle_stats(double A, double B, double C, double* area, double* perimeter);
int main()
{
double A, B, C, S, P;
cin >> A >> B >> C;
triangle_stats(A, B, C, &S, &P);
cout.setf(ios::fixed);
cout.precision(6);
cout << "S = " << S << endl << "P = " << P << endl;
return 0;
}
void triangle_stats(double A, double B, double C, double* area, double* perimeter)
{
*perimeter = A + B + C;
double P2 = *perimeter / 2.0;
*area = sqrt(P2 * (P2 - A) * (P2 - B) * (P2 - C));
}