#include <bits/stdc++.h>
using namespace std;
int main(){
    double c,f;
    cin>>c;
    f=c*9/5+32;
    printf("%.2f",f);
    return 0;
}
/**************************************************************
	Problem: 1031
	User: wengzihang
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/