#include <bits/stdc++.h>

using namespace std;

ofstream fout("secv5.out");

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()) && 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 >> (unsigned 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;
	
	}
	
};

const int DIM = (1 << 20) + 7;

unordered_map <unsigned int, int> H1;
unordered_map <unsigned int, int> H2;

unsigned int v[DIM];

unsigned int n;

unsigned int l, r;

main()
{
	InParser fin("secv5.in");
	fin >> n >> l >> r;
	
	for(int i = 1; i <= n; i++)
		fin >> v[i];
	
	long long l1 = 1, l2 = 1;
	long long ans = 0;
	
	for(int i = 1; i <= n; i++)
	{
		H1[v[i]]++;
		H2[v[i]]++;
		
		while(H1.size() > r)
		{
			H1[v[l1]]--;
			
			if(H1[v[l1]] == 0)
				H1.erase(v[l1]);
			
			l1++;
		}
		
		while(H2.size() >= l)
		{
			H2[v[l2]]--;
			
			if(H2[v[l2]] == 0)
				H2.erase(v[l2]);
			
			l2++;
		}
		
		ans += i - l1 + 1;
		ans -= i - l2 + 1;
	}
	
	fout << ans;
}