#include <iostream>
#include <stdio.h>
using namespace std;
int main()
{
int f;
cin >> f;
printf("%.3f",(f - 32.0) * 5 / 9);
return 0;
}
#include
#include
using namespace std;int main()
{
int f;
cin >> f;
printf("%.3f",(f - 32.0) * 5 / 9);
return 0;
}
eh? cin with printf? that's new