Задача . BS_Модель_A

#include <iostream>

using namespace std;

int dov(double a, double b, double c = 10.0e-6){
 if (abs(a - b) < c ) return 1;
return -1;}
int check(double m, double p = 2.0){
 if (m*m >= p) return 1;
 return 0;}         

auto bs(double L,  double R,  double acc , int p){
  if (dov(L, R, acc) == 1) { return tuple(L, R);}
  double M = (L+R)/2.0;
  if (check(M) > 0) return bs (L, M, acc, p);
  return bs(M,R, acc, p);
}         

int main () {
   double L, R, acc ;
   int p;
   cin >> L >>R >>acc >>p;
   try {
      auto  xy = bs (L, R, acc, p);
      auto x = get<0> (xy);
      auto y = get<1> (xy);
      if ((check(x, p) < 1) and  (check(y, p) > 0) and (dov(x,y, acc ) == 1)) {cout << "True";}
      else {cout<<"False";}
  }
      catch (const exception&){cout <<"Something happened...\n"; return 1;}
return 0;}