输入为267 输出为54.1

#include<bits/stdc++.h>
using namespace std;
int main(){
  double all,sum=0;
  scanf("%lf",&all);
  if(all>=401){
    double a=all-401;
    sum+=a*0.5663;
    all-=a;
  }
  if(all<401 && all>=151){
    double b=all-151;
    sum+=b*0.4663;
    all-=b;
  }
  if(all<150){
    sum+=all*0.4463;
  }
  printf("%.1f",sum);
  return 0;
}