#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> veci;
typedef vector<ll> vecll;
typedef vector<string> vecs;
template<class T,class U> using Hash=unordered_map<T,U>;

#define REP(i, a, n) for(ll i = a; i < (ll)n; i++)
#define RREP(i, a, n) for(ll i = n-1; i >= (ll)a; i--)
#define rep(i, n) REP(i, 0, n)
#define rrep(i, n) RREP(i, 0, n)
#define MD 1000000007

template<class T> T read(){T a;cin >> a;return a;}
template<class T> void read(T& a){cin >> a;}
template<class T, class ...Args> void read(T& a, Args&... args){cin >> a; read(args...);} 
template<class T> void rarr(T a, int n){for(int i = 0; i < n; i++) {cin >> a[i];}}
template<char c = ' ',class T> void write(T a){cout << fixed << setprecision(4) << a << endl;}
template<char c = ' ',class T,class ...Args> void write(T a, Args... args){cout << fixed << setprecision(4) << a << c; write<c>(args...);}
template<class T> void warr(vector<T> a, const char* c = " "){cout << a[0];for(int i = 1; i < (int)a.size(); i++)cout << c << a[i];cout << endl;;}
template<class T> void warr(T a, int n, const char* c = " "){cout << a[0];for(int i = 1; i < n; i++)cout << c << a[i];cout << endl;}
void split(string s, string delim, veci& result){result.clear();string::size_type pos = 0;while(pos != string::npos){string::size_type p = s.find(delim, pos);if(p == string::npos){result.push_back(atoi(s.substr(pos).data()));break;}else {result.push_back(atoi(s.substr(pos, p - pos).data()));}pos = p + delim.size();}}
void split(string s, string delim, vecs& result){result.clear();string::size_type pos = 0;while(pos != string::npos){string::size_type p = s.find(delim, pos);if(p == string::npos){result.push_back(s.substr(pos));break;}else {result.push_back(s.substr(pos, p - pos));}pos = p + delim.size();}}
ull gcd(ull a, ull b){while(true){ull k = a % b;if(k == 0)return b;a = b;b = k;}}
ull lcm(ull a, ull b){return a*b/gcd(a,b);}
ull comb(ull n, ull m){ull p=1;m=min(m,n-m);for(ull i=1;i<=m;i++){p*=n-i+1;p/=i;}return p;}

template<typename FI>
void parted_rotate(FI first1, FI last1, FI first2, FI last2)
{
 if(first1 == last1 || first2 == last2) return;
 FI next = first2;
 while (first1 != next) {
  std::iter_swap(first1++, next++);
  if(first1 == last1) first1 = first2;
  if (next == last2) {
   next = first2;
  } else if (first1 == first2) {
   first2 = next;
  }
 }
}
 
template<typename BI>
bool next_combination_imp(BI first1, BI last1, BI first2, BI last2)
{
 if(first1 == last1 || first2 == last2) return false;
 auto target = last1; --target;
 auto last_elem = last2; --last_elem;
 // find right-most incrementable element: target
 while(target != first1 && !(*target < *last_elem)) --target;
 if(target == first1 && !(*target < *last_elem)) {
  parted_rotate(first1, last1, first2, last2);
  return false;
 }
 // find the next value to be incremented: *next
 auto next = first2;
 while(!(*target < *next)) ++next;
 std::iter_swap(target++, next++);
 parted_rotate(target, last1, next, last2);
 return true;
}
 
// INVARIANT: is_sorted(first, mid) && is_sorted(mid, last)
template<typename BI>
inline bool next_combination(BI first, BI mid, BI last)
{
 return next_combination_imp(first, mid, mid, last);
}

// INVARIANT: is_sorted(first, mid) && is_sorted(mid, last)
template<typename BI>
inline bool prev_combination(BI first, BI mid, BI last)
{
 return next_combination_imp(mid, last, first, mid);
}

int n,l,h;
ll c[10];
ll run(int d){
    ll res=0;
    //rep(i,n)res+=d/c[i];
    int sign=1;
    REP(i,1,n+1){
        ll t[10];
        rep(j,n)t[j]=c[j];
        while(true){
            ll p=1;
            rep(j,i){
                p=lcm(p,t[j]);
                if(p>d)break;
            }
            res+=d/p*sign*i;
            if(!next_combination(t,t+i,t+n))break;
        }
        sign*=-1;
    }
    //write(res);
    return res;
}

int main(void)
{
    read(n,l,h);
    rep(i,n)read(c[i]);
    sort(c,c+n);
    ll res=0;
    res+=run(h);
    res-=run(l-1);
    write(res);
    return 0;
}