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Cod sursa(job #120434)
#include <fstream.h>
using namespace std;
char a[1600000];
int main()
{ long long n,i,s,x,j,cx,r,copie,o,d,ok;
ifstream f1("sum.in");
ofstream f2("sum.out");
f1>>n;
for (i=1;i<=n;i++)
{
f1>>x;
for (j=1;j<=2*x;j++)
a[j]=0;
s=0;
cx=x;
d=2;
while (x!=1)
{
ok=0;
while(x%d==0)
{
x=x/d;
ok=1;
}
if(ok==1)
{
j=1;
while(d*j<2*cx)
{
a[d*j]=1;
j++;
}
}
d++;
}
for (j=1;j<2*cx;j++)
if (a[j]==0) s=s+j;
cout<<s<<"\n";
}
return 0;
}