#include <iostream>
#include <vector>
using namespace std;
 
int main() {
    int n;
    long long k1, k2;
    cin >> n >> k1 >> k2;
 
    vector<long long> arr(n);
    for(int i = 0; i < n; i++) cin >> arr[i];
 
    long long total = 0;
 
    for(int a = 0; a < n; a++) {
        for(int b = a + 1; b < n; b++) {
            if(arr[a] + arr[b] <= k1) continue;
            for(int c = 0; c < n; c++) {
                for(int d = c + 1; d < n; d++) {
                    if(arr[c] + arr[d] > k2) {
                        total++;
                    }
                }
            }
        }
    }
 
    cout << total << endl;
    return 0;
}
 

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