#include <bits/stdc++.h>

using namespace std;
ifstream fin("secv5.in");
ofstream fout("secv5.out");

unsigned int a[1024*1025+50],n,L,U;

int NrSecv(int k)
{
    map<unsigned int,int>M;

    int i,j;
    long long cnt=0;

    i=1;

    for(j=1;j<=n;j++)
    {
        M[a[j]]++;
        while(M.size()>k)
        {
            M[a[i]]--;
            if(M[a[i]]==0)
                M.erase(a[i]);
            i++;
        }
        cnt += (j-i+1);
    }
    return cnt;
}
int main()
{
    fin>>n>>L>>U;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    cout<<NrSecv(U)-NrSecv(L-1)<<"\n";
    return 0;
}