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Cod sursa(job #396949)
#include<fstream>
using namespace std;
unsigned long a[1000000005],n,x,y,nr,s;
int gas(int p,int n)
{
int i;
for(i=p;i<n;i++)
if(a[n]==a[i])
return 0;
return 1;
}
int main()
{
ifstream f("secv5.in");
ofstream g("secv5.out");
unsigned long i,j;
f>>n>>x>>y;
for(i=1;i<=n;i++)
f>>a[i];
s=0;
for(i=1;i<n;i++)
{
nr=1;
for(j=i+1;j<=n;j++)
{
nr+=gas(i,j);
if(nr>=x && nr<=y)
s++;
}
}
g<<s;
f.close();
g.close();
return 0;
}