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OI-codes/Luogu/B2013/B2013.cpp

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2021-07-15 11:09:04 +00:00
#include <bits/stdc++.h>
using namespace std;
int main() {
double f;
cin >> f;
cout << fixed << setprecision(5) << 5 * (f - 32) / 9 << endl;
return 0;
}