#include <fstream>
#include <iostream>
#include <map>
#include <hash_map>
#include <iterator>
#include <algorithm>
#include <vector>
#include <cstring>
#include <cstdlib>
         
#define MAXN ((1<<20) + 1)
#define HASH_SIZE 19793
         
using namespace std;
         
unsigned int vec[MAXN];
unsigned int minimumSpans[MAXN];
        
typedef unsigned int uint32;
    
struct Bucket
{
    uint32 Key;
    uint32 Count;
};
    
typedef vector<Bucket> HashBucket;
  
template <const int HashSize>
class HashTable
{
public:
    uint32& operator [] (uint32 key)
    {
        uint32 hash = key % HashSize;
           
        for (int i=0; i<table[hash].size(); ++i)
        {
            if (table[hash][i].Key == key)
            {
                return table[hash][i].Count;
            }
        }
  
        Bucket b = {key, 0};
        table[hash].emplace_back(b);
  
        return table[hash][table[hash].size() - 1].Count;
    }
  
    void erase(uint32 key)
    {
        uint32 hash = key % HashSize;
           
        for (int i=0; i<table[hash].size(); ++i)
        {
            if (table[hash][i].Key == key)
            {
                table[hash].erase(table[hash].begin() + i);
                return;
            }
        }
    }
           
    void clear()
    {     
        for (int i=0; i<HashSize; ++i)
        {
            table[i].clear();
        }
    }
             
private:
         
    HashBucket table[HashSize];
};
        
HashTable<HASH_SIZE> mapDistincts;
         
int main()
{
    int n, L, U;
    long long numSecv = 0;
    fstream fin("secv5.in" , fstream::in);
    fstream fout("secv5.out", fstream::out);
          
    fin.seekg(0, ios::end);
    int end = fin.tellg();
          
    char* buffer = static_cast<char*>(malloc(end));
      
    fin.seekg (0, ios::beg);
    fin >> n >> L >> U;
    //cout << n << " " << L << " " << U << endl;
          
    fin.read(buffer, end);
    //cout << buffer << endl;
      
    char* pCurrent = buffer;
    for (int i=1; i<=n; ++i)
    {
        //fin >> vec[i];
        pCurrent++;
        while (*pCurrent >= '0' && *pCurrent <= '9')
        {
            vec[i] = 10*vec[i] + (*pCurrent - 48);
            pCurrent++;
        }
            
        //cout << vec[i] << " ";
    }
    //cout << endl;
          
    //free(buffer);
    unsigned int distincts = 0;
    int span = 1;
             
    for (int i=1; i<=n; ++i)
    {
        mapDistincts[vec[i]]++;
        if (mapDistincts[vec[i]] == 1)
        {
            distincts++;
               
            while (distincts > L-1)
            {
                mapDistincts[vec[span]]--;
                if (mapDistincts[vec[span]] == 0)
                {
                    mapDistincts.erase(vec[span]);
                    distincts--;
                }
                         
                span++;
            }
        }
     
        minimumSpans[i] = span;
    }
  
    mapDistincts.clear();
  
    distincts = 0;
    span = 1;
  
    for (int i=1; i<=n; ++i)
    {
        mapDistincts[vec[i]]++;
        if (mapDistincts[vec[i]] == 1)
        {
            distincts++;
               
            while (distincts > U)
            {
                mapDistincts[vec[span]]--;
                if (mapDistincts[vec[span]] == 0)
                {
                    mapDistincts.erase(vec[span]);
                    distincts--;
                }
                         
                span++;
            }
        }
  
        numSecv += (minimumSpans[i] - span);
    }
  
    //mapDistincts.clear();
             
    fout << numSecv << "\n";
             
    return 0;
}