[OJ](http://218.5.5.242:9021/)
by Tiger_Rory @ 2024-03-30 21:10:43
@[Tiger_Rory](/user/680295) 是这样的吗？
```cpp
#include<bits/stdc++.h>
using namespace std;
double c,s,n;
int main(){
cin>>c>>s>>n;
double sum=n*c;
cout<<floor(sum/s)<<'\n';
return 0;
}
```
by 3_14 @ 2024-03-30 21:14:05
@[3_14](https://www.luogu.com.cn/user/913288)
不是
by Tiger_Rory @ 2024-03-30 21:29:43
$(n-1) \times c$ 吧
by luuia @ 2024-03-30 21:35:47
@[luuia](https://www.luogu.com.cn/user/557800)
$（n-1)*c $ 换ceil过了！
感谢！
by Tiger_Rory @ 2024-03-31 14:34:22