Răspuns:
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("numere.in");
int main()
{
int sir[100], i, nrmax, n, nr;
f>>n;
for(i=0;i<n;i++)
f>>sir[i];
for(i=0;i<n;i++)
{
if(sir[i]!=sir[i+1] && sir[i]!=nr)
cout<<sir[i]<<' ';
if(sir[i]==sir[i+1])
nr=sir[i];
}
}
Explicație: