#include<iostream>
#include<cstdio>
#include<cstring>
#include<algorithm>
#include<cstdlib>
#define ll long long
using namespace std;
const int N=400000005;
ll n;
ll l,r;
int ans[N];
int main()
{
	scanf("%d%d%d",&n,&l,&r);
	for (int i=l;i<=r;i++)
	{
		int j=i;
		if (j-n>=0) 
		{
			while (j-n>=0)
			{
				j-=n;
			}
		}
		ans[i]=max(ans[i],j);
	}
	sort(ans+l,ans+r+1);
	cout<<ans[r];
	return 0;
}