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Cod sursa(job #879094)
#include <fstream>
#include<algorithm>
using namespace std;
ifstream f("economie.in");
ofstream g("economie.out");
int n,v[1001],s[50001],i,sol[1001];
int main()
{
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
sort(v+1,v+n+1);
int k=0;
s[0]=1;
for(i=1;i<=n;i++){
if(s[v[i]]==0)
sol[++k]=v[i];
for(int j=0;j+v[i]<=v[n];j++)
if(s[j]==1)
s[j+v[i]]=1;
}
g<<k<<endl;
for(i=1;i<=k;i++)
g<<sol[i]<<" ";
return 0;
}