#include <stdio.h>
#include <map>

#define NMAX 1048576

using namespace std;

unsigned int A[NMAX];
int N, L, U;

int main()
{
    freopen("secv5.in", "r", stdin);
    freopen("secv5.out", "w", stdout);
    
    scanf("%d %d %d", &N, &L, &U);
    for (int i = 0; i<N; ++i)
        scanf("%d", &A[i]);
    
    int nr = 0;
    
    int sol = 0;
    
    map<int, int> M;
    for (int i = 0; i<N; ++i)
    {
        nr = 0;
        M.clear();
        for (int j = i; nr<=U && j<N; ++j)
        {
            int x = M[A[j]];
            if (x == 0)
                ++nr;
            M[A[j]] = x+1;
            if (L<=nr && nr<=U)
                ++sol;
        }
    }
    
    printf("%d", sol);
    
}