做题地址：https://www.luogu.com.cn/problem/P5709
注意t==0
#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std
;
int n
, t
, s
;
int main(){
cin
>> n
>> t
>> s
;
if (t
== 0){
cout
<< 0 << endl
;
return 0;
}
int res
= (s
/ t
) + (s
% t
!= 0);
if (n
- res
> 0) cout
<< n
- res
<< endl
;
else cout
<< 0 << endl
;
return 0;
}
