#include <stdio.h>

int v[1048577],p[1048577],n,u,l;
long long s;

void read(){
	freopen("secv5.in","r",stdin);

    scanf("%d%d%d",&n,&u,&l);

    for(int i=1;i<=n;i++)scanf("%d",&v[i]);
}

void face(){
	int i,j;

    p[1]=1;
    for(i=2;i<=n;i++) if (v[i]!=v[i-1])p[i]=p[i-1]+1;
    				  else p[i]=p[i-1];
    /*for(i=1;i<=n-1;i++)
    	for(j=0;j<i;j++)
        	if (v[i]!=v[j]) p[i]++;

    */
    for(i=2;i<=n;i++)
    	for(j=1;j<i;j++)
        	if((p[i]-p[j]+1>=u)&&(p[i]-p[j]+1<=l)) s++;
}

void write(){
	freopen("secv5.out","w",stdout);

    printf("%ld\n",s);
}

int main(){
	read();
    face();
    write();
	return 0;
}