答案

#include <iostream>
using namespace std;
int main(){
float a,s;
cin>>a;
if(a<=150){
s=a*0.4463;
}else if(a<=400){
s= 66.945+(a-150)*0.4663;
}else {
s=183.52+(a-400)*0.5663;}
printf("%.1f",s);
return 0;
}