Pagini recente » Cod sursa (job #3207402) | Cod sursa (job #3004623) | Cod sursa (job #2508359) | Cod sursa (job #2550903) | Cod sursa (job #765328)
Cod sursa(job #765328)
#include<fstream>
using namespace std;
int main()
{
ifstream fcin("sum.in");
ofstream fcout("sum.out");
int n,x,phi[100005],i,j,max=100000;
for(i=2;i<=max;i++)
phi[i]=i;
for(i=2;i<=max;i++)
if(phi[i]==i)
for(j=i;j<=max;j+=i)
phi[j]/=i,phi[j]*=(i-1);
fcin>>n;
for(i=1;i<=n;i++)
{
fcin>>x;
fcout<<(long long)2*x*phi[x]<<"\n";
}
return 0;
}