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Cod sursa(job #831577)
#include <fstream>
using namespace std;
ifstream in ("sum.in");
ofstream out ("sum.out");
int v[200001];
int main()
{
int n,x,i,d=1,j,q;
long long s=0;
in>>n;
for(i=1;i<=n;i++)
{
in>>x;
//for(q=1;q<=2*x;q++)
// v[q]=q;
for(d=2;d<=x/2;d=d+2)
{
if(x%d==0)
{
for(j=d;j<=2*x;j=j+d)
v[j]=1;
}
if(d==2)
d=1;
}
v[x]=1;
v[2*x]=1;
s=0;
for(q=1;q<=2*x;q++)
if(v[q]==0)
s=s+q;
else
v[q]=0;
out<<s<<"\n";
}
return 0;
}