#include <fstream>
#include <unordered_map>
#include <stdio.h>
#include <ctype.h>

class InParser {
private:
	FILE *fin;
	char *buff;
	int sp;

	char read_ch() {
		++sp;
		if (sp == 4096) {
			sp = 0;
			fread(buff, 1, 4096, fin);
		}
		return buff[sp];
	}

public:
	InParser(const char* nume) {
		fin = fopen(nume, "r");
		buff = new char[4096]();
		sp = 4095;
	}

	InParser& operator >> (int &n) {
		char c;
		while (!isdigit(c = read_ch()));
		n = c - '0';
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		return *this;
	}

	InParser& operator >> (unsigned int &n) {
		char c;
		while (!isdigit(c = read_ch()));
		n = c - '0';
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		return *this;
	}
};

using namespace std;

int n,l,u;
unsigned int v[1<<20+1];
unordered_map < unsigned int , int > ap;

long long secv(int k)
{
    ap.clear();
    long long st=1,cnt=0;
    for(int dr=1;dr<=n;++dr)
    {
        ++ap[v[dr]];
        while(ap.size()>k)
        {
            --ap[v[st]];
            if(ap[v[st]]==0)
                ap.erase(v[st]);
            ++st;
        }
        cnt+=dr-st+1;
    }
    return cnt;
}

int main()
{
    InParser fin("secv5.in");
    ofstream fout("secv5.out");
    fin >> n >> l >> u;
    for(int i=1;i<=n;++i)
        fin >> v[i];
    fout << secv(u)-secv(l-1);
	return 0;
}