#54952: c++解答
yp11452055@yphs.tp.edu.tw
(705-02林姿彣)
#include <iostream>
#include <iomanip>
using namespace std;
int main()
{
double f;
cin >> f;
cout << fixed << setprecision(3)
<< (f - 32) * 5 / 9 << endl;
}