#include <bits/stdc++.h>
using namespace std;
const int NMAX=(1<<20)+5;
int n,L,U;
unsigned int a[NMAX];
unordered_map<unsigned int,int>c;
ifstream fin("secv5.in");
ofstream fout("secv5.out");
inline long long Secv(int lug)
{  unordered_map<unsigned int,int>c;
    int j=1,s=0;
    long long sol=0;
    for(int i=1;i<=n;i++)
    {
        unsigned int x=a[i];
        c[x]++;
        s+=(c[x]==1);
        while(s>lug)
        {
            unsigned int y=a[j];
            c[y]--;
            s-=(c[y]==0);
            j++;
        }
        sol=sol+(i-j+1);
    }
    return sol;
}
int main()
{
    fin>>n>>L>>U;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    long long x,y;
    x=Secv(U);

    y=Secv(L-1);
    fout<<(x-y)<<"\n";
    fin.close();
    fout.close();
    return 0;
}