```cpp
#include<stdio.h>
int main(){
int a;
scanf("%d",&a);
float b=0.4463*a; float c=150*0.4463+(a-150)*0.4663;
if(a<=150)
printf("%.1lf",b);
else if(a>150&&a<=400)
printf("%.1lf",c);
else
printf("%.1lf",150*0.4463+250*0.4663+(a-400)*0.5663);
return 0;
}
额151<=a<=400？？改成(a>150&&a<=400)
```
by 奶酥奶酥QwQ @ 2017-12-28 22:31:34
@[无垠之海](/space/show?uid=60732)
by 奶酥奶酥QwQ @ 2017-12-28 22:36:17