#include <fstream>
#include <map>
using namespace std;

ifstream cin("secv5.in");
ofstream cout("secv5.out");

map<int, int> M;

long long int n, x, y, v[2000005], dr = 0, st = 1, cnt1 = 0, cnt2 = 0, r = 0;

int main(){
    cin>>n>>x>>y;
    for (int i = 1; i <= n; i++){
        cin>>v[i];
    }
    while (dr != n){
        dr++;
        M[v[dr]]++;
        if (M[v[dr]] == 1){
            r++;
        }
        while (r > y){
            M[v[st]]--;
            if (M[v[st]] == 0){
                r--;
            }
            st++;
        }
        if (r <= y){
            cnt1 += dr - st + 1;
        }
    }
    r = 0;
    st = 1;
    dr = 0;
    for (auto &i:M){
        M[i.first] = 0;
    }
    while (dr != n){
        dr++;
        M[v[dr]]++;
        if (M[v[dr]] == 1){
            r++;
        }
        while (r > x - 1){
            M[v[st]]--;
            if (M[v[st]] == 0){
                r--;
            }
            st++;
        }
        if (r <= x - 1){
            cnt2 += dr - st + 1;
        }
    }
    cout<<cnt1 - cnt2;
}