#include <bits/stdc++.h>
 
using namespace std;
 
inline void Open(const string Name) {
    #ifndef ONLINE_JUDGE
        (void)!freopen((Name + ".in").c_str(), "r", stdin);
        (void)!freopen((Name + ".out").c_str(), "w", stdout);
    #endif
}
 
int v[(1 << 20) + 1];
int N, L, U;
 
long long ans;

long long solve(int len) {
    unordered_map <int, int> H;

    long long ans = 0;
    for(int i = 1, j = 1, cnt = 0;i <= N;i++) {
        H[v[i]]++, cnt += (H[v[i]] == 1);
        while(cnt > len) {
            H[v[j]]--;
            cnt -= (H[v[j]] == 0);
            j++;
        }

        ans += i - j + 1;
    }

    return ans;
}
 
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
 
    Open("secv5");
 
    cin >> N >> L >> U;
    for(int i = 1, j = 1;i <= N;i++)
        cin >> v[i];
 
    cout << solve(U) - solve(L - 1);
 
 
    return 0;
}