#include <iostream>
#include <cmath>

using namespace std;

int main( )
{
  double oxy, carb, nitr, sulf, hydro, weight;
  int noxy, ncarb, nnitr, nsulf, nhydro;

  oxy = 15.9994;
  carb = 12.011;
  nitr = 14.00674;
  sulf = 32.066;
  hydro = 1.00794;

  cout <<"Enter the number of oxygen:";
  cin >> noxy;

  cout <<"Enter the number of carbon:";
  cin >> ncarb;

  cout <<"Enter the number of nitrogen:";
  cin >> nnitr;

  cout <<"Enter the number of sulfur:";
  cin >> nsulf;

  cout <<"Enter the number of hydrogen:";
  cin >> nhydro;

  weight = noxy * oxy + ncarb * carb + nnitr * nitr + nsulf * sulf + nhydro * hydro;

  cout <<"the molecular weight for this amino acid is: " << weight << endl;

  return 0;

}