if else

#include <iostream>
using namespace std;

int main() {
int n,x,y;
cin>>n>>x>>y;
if(y%x==0){
if(n-y/x>=0){
cout<<n-y/x;
}
else{
cout<<0;
}

}
else{
    if(n-y/x-1>=0){
        cout<<n-y/x-1;
    }
    else{
        cout<<0;
    }
    
}

}