#include <iostream>

#include <cmath>

using namespace std;

int main()

{

   double x = 0.1722;

   double y = 6.33;

   double z = 3.25 * pow(10, -4);

   double s = 5 * atan(x) - 1.0 / 4 * acos(x) * ((x + 3 * abs(x - y) + pow(x, 2)) / (abs(x - y) * z + pow(x, 2)));

   cout << "s = " << s << endl;

   return 0;

}