60分求助 #2#5 WA

#include<iostream>
#include<iomanip>
using namespace std;
double n,sum;
int f;
int main(){
    cin>>n;
    if(n<=150) sum = n*0.4463;
    if(n>=151&&n<=400) sum = 66.945+(n-150)*0.4663;
    if(n>=401) sum = 183.0537+(n-400)*0.5663; 
    cout<<fixed<<setprecision(1)<<sum<<endl;
    return 0;
}