#include<iostream>
#include<fstream>
#include<vector>
#include<algorithm>
#include<unordered_map>
using namespace std;

ifstream in("secv5.in");
ofstream out("secv5.out");

const int mx=(1<<20)+100;

int n,l,u;
vector<unsigned> v;

void read(){
	in>>n>>l>>u;
	v.resize(n);
	for(int i=0;i<n;i++){
		in>>v[i];
	}
}

unsigned long long solve(unsigned k){
	unordered_map<unsigned,int> values;
	unsigned l=0;
	unsigned long long sum=0;

	for(int i=0;i<n;i++){
		values[v[i]]++;

		while(values.size()>k){
			values[v[l]]--;
			if(values[v[l]]==0){
				values.erase(values.find(v[l]));
			}
			l++;
		}
		sum+=(i-l+1);
	}
	return sum;
}

void solve(){
	out<<solve(u)-solve(l-1);
}

int main(){
	read();
	solve();
	return 0;
}