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#include <iostream>
#include <map>
#include <iterator>
#include <fstream>
using namespace std;
int main(){
    ifstream f("secv5.in");
    ofstream g("secv5.out");
    int n,l,u,nr=0,s=0,i,j;
    f>>n>>l>>u;
    int v[n];
    for(i=0;i<n;i++)
        f>>v[i];
    for(i=0;i<n-u;i++)
    {
        nr = 1;
        for(j=i+1;j<n;j++)
            if(v[i] != v[j])
                nr++;
        if(nr >=l)
            s+=nr;
    }
    g<<s;
    return 0;
}