#include <string>
#include <vector>
#include <iostream>
#include <functional>
using namespace std;
int main() {
	int N; long long L, R;
	cin >> N >> L >> R;
	vector<long long> A(N);
	string cond(61, '?');
	for (int i = 0; i < N; ++i) {
		cin >> A[i];
	}
	bool ok = true;
	for (int i = 0; i < N - 1; ++i) {
		if (A[i] == A[i + 1]) {
			ok = false;
			break;
		}
		int d = 60;
		while (!(((A[i] ^ A[i + 1]) >> d) & 1)) --d;
		if (A[i] < A[i + 1]) {
			if (cond[d] == '1') {
				ok = false;
				break;
			}
			cond[d] = '0';
		}
		else {
			if (cond[d] == '0') {
				ok = false;
				break;
			}
			cond[d] = '1';
		}
	}
	function<long long(long long)> calc = [&](long long x) {
		long long cur = 0, ans = 0;
		for (int i = 60; i >= 0; --i) {
			if (cur + (1LL << i) <= x) {
				cur += 1LL << i;
				if (cond[i] == '1') continue;
				int cnt = 0;
				for (int j = 0; j < i; ++j) {
					if (cond[j] == '?') ++cnt;
				}
				ans += 1LL << cnt;
				if (cond[i] == '0') break;
			}
			else if (cond[i] == '1') break;
		}
		return ans;
	};
	long long cl = calc(L);
	long long cr = calc(R + 1);
	cout << cr - cl << endl;
	return 0;
}