#include <bits/stdc++.h>
#define int long long
using namespace std;
int v[1100005];
signed main()
{
    ifstream cin("secv5.in");
    ofstream cout("secv5.out");
    unordered_map<int, int> f;
    int n, x, y, cnt=0, l=1, rez=0, rez2=0;
    cin>>n>>x>>y;
    for(int i=1; i<=n; i++)
    {
        cin>>v[i];
    }
    for(int r=1; r<=n; r++)
    {
        f[v[r]]++;
        if(f[v[r]]==1)
        {
            cnt++;
            while(cnt>y)
            {
                f[v[l]]--;
                if(f[v[l]]==0)
                    cnt--;
                l++;
            }
        }
        rez+=r-l+1;
    }
    f.clear();
    cnt=0; l=1;
    for(int r=1; r<=n; r++)
    {
        f[v[r]]++;
        if(f[v[r]]==1)
        {
            cnt++;
            while(cnt>x-1)
            {
                f[v[l]]--;
                if(f[v[l]]==0)
                    cnt--;
                l++;
            }
        }
        rez2+=r-l+1;
    }
    cout<<rez-rez2;
    return 0;
}