#include<bits/stdc++.h>
using namespace std;
int main() {
    int n,L,R;
    cin>>n>>L>>R;
    int max_remainder=(R/n)*n-1;
    if (max_remainder>=L){
        cout<<n-1<<endl;
    }else{
        cout<<R%n<<endl;
    }
    return 0;
}``````

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