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#include<fstream>
using namespace std;
int con,a[2<<20],i,j,st,dr,l,u,n,ok,mx,z;
int verif(int x,int y)
{
int ok=1,s=0,i,j,ser=1;
for(i=x;i<=y;i++)
{
ser=1;
for(j=x;j<i&&ser==1;j++)
if(a[j]==a[i])
ser=0;
if(ser==1)
s++;
}
return s;
}
int main()
{
ifstream f("secv5.in");
ofstream g("secv5.out");
f>>n>>l>>u;
for(i=1;i<=n;i++)
f>>a[i];
st=1;
while(st<=n-l)
{
dr=st+1;
ok=1;
while(ok==1&&dr<=n)
{
if(verif(st,dr)<=u&&verif(st,dr)>=l);
con++;
if(verif(st,dr)>u)
ok=0;
dr++;
}
st++;
}
g<<con;
return 0;
}