#include <cstdio>
#include <vector>
using namespace std;
typedef pair <int,  int> ii;
const int NMAX = (1 << 20) + 5;
const int MOD = 666013;
vector <ii> h[MOD + 5];
void clearh()
{
    for(int i = 0 ; i < MOD ; ++ i)
        h[i].clear();
}
void inserth(int x)
{
    h[x % MOD].push_back({x, 1});
}
int findh(int x)
{
    int i, key = x % MOD;
    for(i = 0 ; i < h[key].size() ; i ++)
        if(h[key][i].first == x)
            return h[key][i].second;
    return -1;
}
void updateh(int x, int val)
{
    int i, key = x % MOD;
    for(i = 0 ; i < h[key].size() ; i ++)
        if(h[key][i].first == x)
            h[key][i].second += val;
}
void eraseh(int x)
{
    int i, key = x % MOD;
    for(i = 0 ; i < h[key].size() ; i ++)
        if(h[key][i].first == x)
        {
            h[key].erase(h[key].begin() + i);
            return;
        }
}
int v[NMAX + 5];
long long secv(int n, int lim)
{
    if(lim == 0)
        return 0;
    int st, dr, cnt;
    long long nr = 0;
    clearh();
    cnt = 0;
    for(st = dr = 1 ; dr <= n ; ++ dr)
    {
        if(findh(v[dr]) != -1)
            updateh(v[dr], 1);
        else
        {
            inserth(v[dr]);
            ++ cnt;
        }
        while(cnt > lim)
        {
            updateh(v[st], -1);
            if(findh(v[st]) == 0)
            {
                eraseh(v[st]);
                -- cnt;
            }
            ++ st;
        }
        nr += (dr - st + 1);
    }
    return nr;
}
int main()
{
    freopen("secv5.in", "r", stdin);
    freopen("secv5.out", "w", stdout);
    int n, i, l, u;
    scanf("%d%d%d" , &n , &l , &u);
    for(i = 1 ; i <= n ; ++ i)
         scanf("%d" , &v[i]);
    printf("%lld\n", secv(n, u) - secv(n, l - 1));
    return 0;
}