#include<bits/stdc++.h>
using namespace std;

ifstream fin("secventa5.in");
ofstream fout("secventa5.out");

const int NMAX=(1<<20)+5;

int n,L,U,a[NMAX],AIB[NMAX];
long long sol;
map<int,int>M;

inline int zeros(int x)
{
    return x^(x&(x-1));
}

inline void Update(int poz,int val)
{
    for (int i=poz;i<=n;i+=zeros(i)) AIB[i]+=val;
}

inline int Query(int poz)
{
    int pw,rez=0,cnt=0;
    if (poz==0) return 0;
    for (pw=19;pw>=0;pw--)
        if ((rez+(1<<pw))<=n && (cnt+AIB[rez+(1<<pw)])<poz)
            {
                rez+=1<<pw;
                cnt+=AIB[rez];
            }
    rez++;
    return rez;
}

int main()
{
    int i,cnt=0;
    fin>>n>>L>>U;
    for (i=1;i<=n;i++) fin>>a[i];
    for (i=1;i<=n;i++)
        {
            Update(i,1);
            if (M.find(a[i])!=M.end()) Update(M[a[i]],-1);
            else cnt++;
            M[a[i]]=i;
            if (cnt>=L) sol+=Query(cnt-L+1)-Query(max(0,cnt-U));
        }
    fout<<sol<<"\n";
    return 0;
}