#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
using ll = long long ;
using P = pair<int,int> ;
using pll = pair<long long,long long>;
constexpr int INF = 1e9;
constexpr long long LINF = 1e17;
constexpr int MOD = 1000000007;
constexpr double PI = 3.14159265358979323846;

int main(){
    int n;
    scanf("%d",&n);
    int s,t;
    scanf("%d %d",&s,&t);
    --s;--t;
    vector<ll> a(n);
    rep(i,n) scanf("%lld",&a[i]);
    vector<ll> b,c;
    for(int i=(s+1)%n;i!=t;i=(i+1)%n) b.push_back(a[i]);
    for(int i=(s-1+n)%n;i!=t;i=(i-1+n)%n) c.push_back(a[i]);

    if((int)(b.size())%2==0 && (int)(c.size())%2==0){
        ll ss = a[s],tt = a[t];
        rep(i,b.size()/2) ss += b[i],tt += b[i+(int)(b.size())/2];
        rep(i,c.size()/2) ss += c[i],tt += c[i+(int)(c.size())/2];
        cout << ss-tt << endl;
    }else if((int)(c.size())%2==0){
        ll ss = a[s],tt = a[t];
        rep(i,b.size()/2) ss += b[i],tt += b[i+1+(int)(b.size())/2];
        rep(i,c.size()/2) ss += c[i],tt += c[i+(int)(c.size())/2];
        ss += b[(int)(b.size())/2];
        cout << ss-tt << endl;
    }else if((int)(b.size())%2==0){
        ll ss = a[s],tt = a[t];
        rep(i,b.size()/2) ss += b[i],tt += b[i+(int)(b.size())/2];
        rep(i,c.size()/2) ss += c[i],tt += c[i+1+(int)(c.size())/2];
        ss += c[(int)(c.size())/2];
        cout << ss-tt << endl;
    }else{
        ll ss = a[s],tt = a[t];
        rep(i,b.size()/2) ss += b[i],tt += b[i+(int)(b.size())/2];
        rep(i,c.size()/2) ss += c[i],tt += c[i+(int)(c.size())/2];
        ss += max(b[(int)(b.size())/2], c[(int)(c.size())/2]);
        tt += min(b[(int)(b.size())/2], c[(int)(c.size())/2]);
        cout << ss-tt << endl;
    }

    return 0;
}