#define boostIO ios_base::sync_with_stdio(false); fin.tie(nullptr); fout.tie(nullptr);
#pragma GCC optimize ("Ofast")
#include <bits/stdc++.h>

using namespace std;

ifstream fin  ("secvmax.in");
ofstream fout ("secvmax.out");

const int MAX_N = 1050000;
int v[MAX_N];

int n, lower, upper;

unordered_map <int, int> freq;
int solve(int limit){
    freq.clear();

    int answer = 0, st = 1, dif = 0;
    for(int i=1; i<=n; i++){
        if(++freq[v[i]] == 1) dif++;

        while(st <= i && dif > limit)
            if(--freq[v[st++]] == 0)
                dif--;

        answer += i-st+1;
    }
    return answer;
}

signed main (){
    boostIO
    fin>>n>>lower>>upper;
    for(int i=1; i<=n; i++)
        fin>>v[i];

    fout<<solve(upper) - solve(lower-1);
    return 0;
}