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

//233 4567 4657
//230