```cpp
#include<bits/stdc++.h>
using namespace std;
struct yangs
{
int shul;
int jiag;
};
int main()
{
int sl, min = 0x3f3f3f3f;
cin >> sl;
yangs a;
for(int i = 0; i < 3; i++)
{
cin >> a.shul >> a.jiag;
double bs = ceil(sl * 1.0/a.shul);
if(bs * a.jiag < min)min = bs * a.jiag;
}
cout << min;
return 0;
}
```
by cleverclever @ 2023-07-21 14:31:37
这个代码是可以AC的哦~
以后要慎用变量类型，按照题目要求来做。
by cleverclever @ 2023-07-21 14:33:00