#include <bits/stdc++.h>
using namespace std;
double man,bou;
int main() {
    cin>>man;
    if(man<=150){
         cout<<fixed<< setprecision(1)<<man*0.4463;
        man-=149;
    }if(man>=151||man<=400){
         cout<<fixed<< setprecision(1)<<man*0.4663;
         man-=400;
    }if(man>=401){
       cout<<fixed<< setprecision(1)<<man*0.5663;
    }
     
    return 0;
}

In：267

Out：124.5

哪里多的三啊！！！