#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

long long gcd(long long a, long long b){
    while(b != 0){
        long long tmp = a % b;
        a = b;
        b = tmp;
    }
    return a;
}

long long lcm(long long a, long long b){
    return a / gcd(a, b) * b;
}

long long solve(const vector<int>& c, int limit)
{
    int n = c.size();
    long long ans = 0;

    for(int i=1; i<(1<<n); ++i){
        bitset<32> bs(i);
        long long x = 1;
        for(int j=0; j<n; ++j){
            if(bs[j])
                x = lcm(x, c[j]);
            if(x > limit){
                x = -1;
                break;
            }
        }

        if(x != -1){
            int m = bs.count();
            if(m % 2 == 1)
                ans += limit / x * m;
            else
                ans -= limit / x * m;
        }
    }

    return ans;
}

int main()
{
    int n, l, h;
    cin >> n >> l >> h;
    vector<int> c(n);
    for(int i=0; i<n; ++i)
        cin >> c[i];

    long long ans = solve(c, h) - solve(c, l-1);
    cout << ans << endl;

    return 0;
}