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Cod sursa(job #990053)
#include <fstream>
#include <algorithm>
using namespace std;
ifstream f("economie.in");
ofstream g("economie.out");
int n, a[1005], sol[1005], dim;
bool used[100005];
int main()
{
f>>n;
for (int i=1; i<=n; ++i) f>>a[i];
sort(a+1, a+n+1);
for (int i=1; i<=n; ++i)
if (!used[a[i]])
{
used[a[i]]=1; sol[++dim]=a[i];
for (int j=0; j<=a[n]; ++j)
if (used[j]) used[j+a[i]]=1;
}
g<<dim<<'\n';
for (int i=1; i<=dim; ++i) g<<sol[i]<<'\n';
return 0;
}