#include<stdio.h>
#include<vector>

using namespace std;

#define MOD 666013
#define NMAX 1050000

int n, a, b;
unsigned int v[NMAX];
int num;

vector<pair<unsigned int, int> > hash[MOD];
vector<pair<unsigned int, int> >::iterator it;

void inline insert(unsigned int x)
{
    int lin=x%MOD;

    for(it=hash[lin].begin(); it!=hash[lin].end(); ++it)
    {
        if(it->first==x)
        {
            ++it->second;

            if(it->second==1)
                ++num;

            break;
        }
    }

    if(it==hash[lin].end())
    {
        hash[lin].push_back(make_pair(x, 1));

        ++num;
    }
}

void inline erase(unsigned int x)
{
    int lin=x%MOD;

    for(it=hash[lin].begin(); it!=hash[lin].end(); ++it)
    {
        if(it->first==x)
        {
            --it->second;

            if(it->second==0)
            {
                swap(*it, hash[lin].back());
                hash[lin].pop_back();

                --num;
            }

            break;
        }
    }
}

long long rez(int x)
{
    int st=1;
    long long sol=0;

    for(int i=0; i<MOD; ++i)
        hash[i].clear();
    num=0;

    for(int i=1; i<=n; ++i)
    {
        insert(v[i]);

        while(st<=i && num>x)
        {
            erase(v[st]);
            ++st;
        }

        sol+=(long long)(i-st+1);
    }

    return sol;
}

int main()
{
    freopen("secv5.in", "r", stdin);
    freopen("secv5.out", "w", stdout);

    long long sol;

    scanf("%d%d%d", &n, &a, &b);

    for(int i=1; i<=n; ++i)
        scanf("%u", &v[i]);

    sol=rez(b) - rez(a-1);

    printf("%lld\n", sol);

    return 0;
}