求助啊

#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int dian;
    double yuan;
    scanf("%d",dian);
    if(dian<=150){
        yuan=0.4463*dian;
    }else if(dian<=400&&dian>150){
        yuan=0.4663*dian;
    }else{
        yuan=0.5663*dian;
    }
    printf("%lf.1",yuan);
    return 0;
}

下载的输入样例：256

输出样例：141.3

？？？