题解

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,x,y;
    cin>>n;
    cin>>x;
    cin>>y;
    if(y%x==0) cout<<n-y/x;
    if(y%x!=0) cout<<n-y/x-1;
    else if(y%x>=n)
    return 0;
}