#include <bits/stdc++.h>
using namespace std;
int main()
{
    int n, L, R;scanf("%d%d%d", &n, &L, &R);
    if(R-L >=n)printf("%d\n", n-1);
    else
    {
        L=L%n;R=R%n;
        if(L<=R)printf("%d\n", R);
        else printf("%d\n", n-1);
    }
    return 0;
}

#include<bits/stdc++.h>
using namespace std;
int main()
{
    int n,L,R;scanf("%d%d%d",&n,&L,&R);
    if(R-L>=n)printf("%d\n",n-1);
    else
    {
        L=L%n;R=R%n;
        if(L<=R)printf("%d\n",R);
        else printf("%d\n",n-1);
    }
    return 0;
}