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Cod sursa(job #10079)
#include <cstdio>
#include <set>
using namespace std;
int x[1000000], n, L, U;
int main()
{
freopen("secv5.in", "r", stdin);
scanf("%d %d %d\n", &n, &L, &U);
int i, j, k;
long long nr=0;
for(i=1;i<=n;i++) scanf("%d ", x+i);
for(i=1;i<=n;i++)
for(j=i;j<=n;j++)
{
set<int>Q;
for(k=i;k<=j;k++)Q.insert(x[k]);
if(Q.size()>=L && Q.size()<=U) nr++;
}
freopen("secv5.out", "w", stdout);
printf("%lld\n", nr);
return 0;
}