#include <bits/stdc++.h>
using namespace std;
using i32 = int;
using i64 = long long;

const i32 sup = 2e9;

int main() {
    i32 n, l, h; cin >> n >> l >> h;
    vector<i32> cs(n);
    for (auto& c : cs) cin >> c;

    auto get = [&](i32 x) {
        return h / x - (l - 1) / x;
    };

    auto Lcm = [&](i32 a, i32 b) -> i32 {
        if (a / gcd(a, b) > sup / b) return sup;
        else return lcm(a, b); 
    };

    i32 ans = 0;
    for (i32 i = 0 ; i < n ; i++) {
        ans += get(cs[i]);
        for (i32 bit = 1 ; bit < (1 << n) ; bit++) {
            if (!(bit & (1 << i))) continue;
            if (__builtin_popcount(bit) == 1) continue;
            i32 mul = 1;
            for (i32 j = 0 ; j < n ; j++) {
                if (!(bit & (1 << j))) continue;
                mul = Lcm(mul, cs[j]);
            }
            // cout << get(mul) << endl;
            ans += (__builtin_popcount(bit) & 1 ? get(mul) : -get(mul));
        }
    }

    cout << ans << endl;
}