#include <iostream>
#include <algorithm>
#include <bitset>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <cstring>
#include <utility>
#include <vector>
#include <complex>
#include <valarray>
#include <fstream>
#include <cassert>
#include <cmath>
#include <functional>
#include <iomanip>
#include <numeric>
#include <climits>
#include <random>

#define _overload(a, b, c, d, ...) d
#define _rep1(X, A, Y) for (int (X) = (A);(X) <= (Y);++(X))
#define _rep2(X, Y) for (int (X) = 0;(X) < (Y);++(X))
#define rep(...) _overload(__VA_ARGS__, _rep1, _rep2)(__VA_ARGS__)
#define rrep(X, Y) for (int (X) = Y-1;(X) >= 0;--(X))
#define all(X) (X).begin(),(X).end()
#define len(X) ((int)(X).size())
#define mod(n, m) (((n)%(m)+(m))%m)
#define fi first
#define sc second
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> Pii;
typedef pair<ll, ll> Pll;
const int INFINT = 1 << 30;                          // 1.07x10^ 9
const ll INFLL = 1LL << 60;                          // 1.15x10^18
const double EPS = 1e-10;
const int MOD = 1000000007;
const int dx[4] = {1, 0, -1, 0}, dy[4] = {0, 1, 0, -1};

const int MAX_N = 100000;
int N;
ll L, R;
ll A[MAX_N];
int bitmap[61];

void set_bitmap();

ll max_x();

ll min_x();

int main() {

    cin >> N >> L >> R;
    rep(i, N) cin >> A[i];

    set_bitmap();

    ll ma = max_x();
    ll mi = min_x();

    if (ma < L) {
        cout << 0 << endl;
    } else if (mi > R) {
        cout << 0 << endl;
    } else {
        ll mi_bit = 0, ma_bit = 0;
        for (int i = 61; i >= 0; --i) {
            if (bitmap[i] == 2) {
                mi_bit <<= 1; ma_bit <<= 1;
                mi_bit |= ((mi>>i)&1);
                ma_bit |= ((ma>>i)&1);
            }
        }
        cout << ma_bit - mi_bit + 1 << endl;
    }

    return 0;
}

ll max_x() {
    ll res = 0;

    for (int i = 61; i >= 0; --i) {
        if (bitmap[i] == 1) {
            res += 1LL << i;
        }
    }

    if (res > R) return -1;

    for (int i = 61; i >= 0; --i) {
        if (bitmap[i] == 2) {
            ll tmp = res;
            tmp += 1LL << i;
            if (tmp <= R) {
                res = tmp;
            }
        }
    }

    return res;
}

ll min_x() {
    ll res = 0;

    for (int i = 61; i >= 0; --i) {
        if (bitmap[i] == 1) {
            res += 1LL << i;
        }
    }

    if (res >= L) return res;

    for (int i = 61; i >= 0; --i) {
        if (bitmap[i] == 2) {
            ll tmp = res;
            tmp += 1LL << i;
            if (tmp < L) res = tmp;
        }
    }

    int first_zero_bit = -1;
    for (int i = 0; i <= 61; ++i) {
        if ((bitmap[i] == 2) && ((res >> i) & 1) == 0) {
            first_zero_bit = i;
            break;
        }
    }

    if (first_zero_bit < 0) return INFLL;

    res += 1ll << first_zero_bit;
    for (int i = 0; i < first_zero_bit; ++i) {
        if (bitmap[i] == 2) {
            res -= 1ll << i;
        }
    }

    return res;
}


void set_bitmap() {
    vector<Pii> section;
    section.emplace_back(0, N);
    for (ll i = 61; i >= 0; --i) {
        vector<Pii> tmp_section;
        bool must_flag = false;
        bool must_not_flag = false;
        for (ll j = 0; j < len(section); ++j) {
            ll lb = section[j].fi;
            ll ub = section[j].sc;

            bool all_zero = true;
            for (ll k = lb; k < ub; ++k) {
                if (((A[k] >> i) & 1) == 1) {
                    all_zero = false;
                    break;
                }
            }
            if (all_zero) {
                tmp_section.emplace_back(Pii(lb, ub));
                continue;
            }

            bool all_one = true;
            for (ll k = lb; k < ub; ++k) {
                if (((A[k] >> i) & 1) == 0) {
                    all_one = false;
                    break;
                }
            }
            if (all_one) {
                tmp_section.emplace_back(Pii(lb, ub));
                continue;
            }

            ll first_one_index = 0;
            if (((A[lb] >> i) & 1) == 0) {
                for (ll k = lb; k < ub; ++k) {
                    if (((A[k] >> i) & 1) == 1) {
                        first_one_index = k;
                        break;
                    }
                }

                bool valid_section = true;
                for (ll k = first_one_index; k < ub; ++k) {
                    if (((A[k] >> i) & 1) == 0) {
                        valid_section = false;
                        break;
                    }
                }

                if (!valid_section) {
                    cout << 0 << endl;
                    exit(0);
                }

                must_not_flag = true;
            } else {
                for (ll k = lb; k < ub; ++k) {
                    if (((A[k] >> i) & 1) == 0) {
                        first_one_index = k;
                        break;
                    }
                }

                bool valid_section = true;
                for (ll k = first_one_index; k < ub; ++k) {
                    if (((A[k] >> i) & 1) == 1) {
                        valid_section = false;
                        break;
                    }
                }

                if (!valid_section) {
                    cout << 0 << endl;
                    exit(0);
                }

                must_flag = true;
            }

            tmp_section.emplace_back(lb, first_one_index);
            tmp_section.emplace_back(first_one_index, ub);
        }

        if (must_not_flag && must_flag) {
            cout << 0 << endl;
            exit(0);
        } else if (must_flag) {
            bitmap[i] = 1;
        } else if (must_not_flag) {
            bitmap[i] = 0;
        } else {
            bitmap[i] = 2;
        }

        section = tmp_section;
    }
}