#include <iostream>
#include <algorithm>
#include <vector>

int64_t gcd(int64_t x, int64_t y) {
    if (y == 0) return x;
    return gcd(y, x % y);
}

int64_t lcm(int64_t x, int64_t y) {
    return std::min<long long>(1000000001LL, x / gcd(x, y) * y);
}

int64_t f(int64_t x, std::vector<int64_t> c) {
    const int n = c.size();
    std::vector<int64_t> cnt(1 << n);

    for (int i = 0; i < 1 << n; i++) {
        int64_t l = 1;
        for (int j = 0; j < n; j++) {
            if (i >> j & 1) {
                l = lcm(l, c[j]);
            }
        }
        cnt[i] = x / l;
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < 1 << n; j++) {
            if (~j >> i & 1) {
                cnt[j | 1 << i] -= cnt[j];
            }
        }
    }

    int64_t ret = 0;
    for (int i = 0; i < n; i++) {
        int u = ((1 << n) - 1) ^ (1 << i);
        int v = ((1 << n) - 1);
        ret += cnt[u] + cnt[v];
    }

    return ret;
}

int main() {
    int64_t N, L, H;
    std::cin >> N >> L >> H;

    std::vector<int64_t> c(N);
    for (int i = 0; i < N; i++) {
        std::cin >> c[i];
    }

    std::cout << f(H, c) - f(L - 1, c) << std::endl;
}