如题，附代码

#include<iostream>
#include<cmath>
using namespace std;
int main(){
	long double need,a1,a2,b1,b2,c1,c2,a,b,c,out;
	cin>>need;
	cin>>a1>>a2;
	cin>>b1>>b2;
	cin>>c1>>c2;
	a=ceil(need/a1)*a2;
	b=ceil(need/b1)*b2;
	c=ceil(need/c1)*c2;
	out=min(min(c,b),a);
	cout<<out;return 0;
} 

测试点14 WA
Wrong Answer. wrong answer On line 1 column 2, read ., expected 9.

刚入坑轻喷qwq