#include <fstream>
#include <vector>

using namespace std;

class InParser {
private:
	FILE *fin;
	char *buff;
	unsigned 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()) && c != '-');
		int sgn = 1;
		if (c == '-') {
			n = 0;
			sgn = -1;
		} else {
			n = c - '0';
		}
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		n *= sgn;
		return *this;
	}

	InParser& operator >> (long long &n) {
		char c;
		n = 0;
		while (!isdigit(c = read_ch()) && c != '-');
		long long sgn = 1;
		if (c == '-') {
			n = 0;
			sgn = -1;
		} else {
			n = c - '0';
		}
		while (isdigit(c = read_ch())) {
			n = 10 * n + c - '0';
		}
		n *= sgn;
		return *this;
	}
} f("secv5.in");

ofstream g("secv5.out");

int n, l, r, sz;

const int MOD = 666013;

long long a[2000005];

vector<pair<unsigned int, int>> hashMap[MOD];

inline void insertHash(unsigned int k)
{
    int key = k % MOD;

    for (int i = 0; i < (int) hashMap[key].size(); ++i) {
        if (hashMap[key][i].first == k) {
            hashMap[key][i].second++;
            return;
        }
    }

    sz++;
    hashMap[key].push_back({k, 1});
}

inline void eraseHash(unsigned int k)
{
    int key = k % MOD;

    for (int i = 0; i < (int) hashMap[key].size(); ++i) {
        if (hashMap[key][i].first == k) {

            hashMap[key][i].second--;

            if (hashMap[key][i].second == 0) {
                hashMap[key].erase(hashMap[key].begin() + i);
                sz--;
            }

            return;
        }
    }
}

inline long long twoPointers(int i)
{
    int st = 1;

    sz = 0;

    long long ans = 0;

    for (int dr = 1; dr <= n; ++dr) {
        insertHash(a[dr]);

        while (sz > i && st <= dr) {
            eraseHash(a[st]);

            st++;
        }

        ans += dr - st + 1;
    }

    for (int i = 0; i < MOD; ++i) {
        hashMap[i].clear();
    }

    return ans;
}

int main()
{
    f >> n >> l >> r;

    for (int i = 1; i <= n; ++i) {
        f >> a[i];
    }

    g << twoPointers(r) - twoPointers(l - 1);

    return 0;
}