#include <fstream>
#include <unordered_map>
#define DIM (1<<20 + 5)
#define DIMBUFF 100005
using namespace std;
FILE *fin =  fopen ("secv5.in", "r");
FILE *fout = fopen ("secv5.out", "w");
unordered_map <unsigned int, int> st,dr;
unsigned int n,l,u,v[DIM];
long long a,b,sol;
char buff[DIMBUFF];
int pp;
int numar() {
    int val = 0;
    while (!(buff[pp] >= '0' && buff[pp] <= '9')) {
        pp++;
        if (pp == DIMBUFF) {
            fread(buff, 1, DIMBUFF, fin);
            pp=0;
        }
    }
    while (buff[pp] >= '0' && buff[pp] <= '9') {
        val = val*10 + buff[pp] - '0';
        pp++;
        if (pp == DIMBUFF) {
            fread(buff, 1, DIMBUFF, fin);
            pp=0;
        }
    }
    return val;
}
int main(){
    fread(buff, 1, DIMBUFF, fin);
    n=numar(), l=numar(), u=numar();
    for (int i=1; i<=n; i++)
        v[i]=numar();
    a=b=1;
    for (int i=1;i<=n;i++){
        st[v[i]]++, dr[v[i]]++;
        while (st.size()>=l){
            st[v[a]]--;
            if (st[v[a]]==0)
                st.erase(v[a]);
            a++;
        }
        while (dr.size()>u){
            dr[v[b]]--;
            if (dr[v[b]]==0)
                dr.erase(v[b]);
            b++;
        }
        sol+=a-b;
    }
    fprintf (fout, "%lld", sol);
    return 0;
}