//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx")
//#undef LOCAL
#include <bits/stdc++.h>

using namespace std;
using uint = unsigned int;
using ll = long long;
using ull = unsigned long long;
constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); }
template <class T> using V = vector<T>;
template <class T> using VV = V<V<T>>;

#ifdef LOCAL
struct PrettyOS {
    ostream& os;
    bool first;
    template <class T> auto operator<<(T&& x) {
        if (!first) os << ", ";
        first = false;
        os << x;
        return *this;
    }
};
template <class... T> void dbg0(T&&... t) {
    (PrettyOS{cerr, true} << ... << t);
}
#define dbg(...)                                            \
    do {                                                    \
        cerr << __LINE__ << " : " << #__VA_ARGS__ << " = "; \
        dbg0(__VA_ARGS__);                                  \
        cerr << endl;                                       \
    } while (false);
#else
#define dbg(...)
#endif

template <class T, class U>
ostream& operator<<(ostream& os, const pair<T, U>& p) {
    return os << "P(" << p.first << ", " << p.second << ")";
}

template <class T> ostream& operator<<(ostream& os, const V<T>& v) {
    os << "[";
    for (auto d : v) os << d << ", ";
    return os << "]";
}

ll up;
V<int> fix(62, -1);

using S = pair<int, bool>;
map<S, ll> dp;
ll solve(int he, bool same) {
    if (he == -1) return 1;
    auto key = S(he, same);
    if (dp.count(key)) return dp[key];
    ll ans = 0;
    ll nw = (up >> he) & 1;
    if (fix[he] != 1) {
        ans += solve(he - 1, (same) && nw == 0);
    }
    if (fix[he] != 0 && !(same && nw == 0)) {
        ans += solve(he - 1, (same) && nw == 1);
    }
    return dp[key] = ans;
}

ll solve(ll x) {
    up = x;
    dp.clear();
    return solve(61, true);
}

int main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    cout << fixed << setprecision(20);
    int n;
    ll l, r;
    cin >> n >> l >> r;
    V<ll> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }

    for (int i = 0; i < n - 1; i++) {
        ll x = a[i], y = a[i + 1];
        for (int he = 61; he >= 0; he--) {
            ll u = (x >> he) & 1;
            ll v = (y >> he) & 1;
            if (u == v) continue;
            dbg(x, y, u, v, he);

            if (u < v) {
                if (fix[he] == 1) {
                    cout << 0 << endl;
                    return 0;
                }
                fix[he] = 0;
            } else {
                if (fix[he] == 0) {
                    cout << 0 << endl;
                    return 0;
                }
                fix[he] = 1;
            }
            break;
        }
    }
    dbg(fix);
    ll ans = solve(r);
    if (l) ans -= solve(l - 1);
    cout << ans << endl;
    return 0;
}