@[QYlucky](/user/689435) 帮你改了一下，我测试没问题
```c++
#include<iostream>
using namespace std;
int main() {
int n,a1,b1,a2,b2,a3,b3,bag1,bag2,bag3,sum1,sum2,sum3,sum;
cin>>n;
cin>>a1>>b1;
cin>>a2>>b2;
cin>>a3>>b3;
if(n%a1==0)
bag1=n/a1;
else{
bag1=n/a1+1;
}
sum1=b1*bag1;
if(n%a2==0)
bag2=n/a2;
else{
bag2=n/a2+1;
}
sum2=b2*bag2;
if(n%a3==0)
bag3=n/a3;
else{
bag3=n/a3+1;
}
sum3=b3*bag3;
if(sum1<=sum2&&sum1<=sum3) //要用等号
cout<<sum1<<endl; //直接输出
if(sum2<=sum1&&sum2<=sum3)
cout<<sum2<<endl;
if(sum3<=sum2&&sum3<=sum1)
cout<<sum3<<endl;
return 0;
}
```
by Jasper08 @ 2022-03-12 19:57:43
@[Jasper08](/user/581830) 感谢 感谢 感谢！！！
by QYlucky @ 2022-03-12 20:03:44