Cod sursa(job #2083373)
Utilizator | Data | 7 decembrie 2017 17:15:35 | |
---|---|---|---|
Problema | Sum | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.52 kb |
#include <fstream>
using namespace std;
int phi[100001];
int main()
{
ifstream in("sum.in");
ofstream out("sum.out");
int n,x,y;
for(int i=1;i<=100000;i++)
phi[i]=i;
for(int i=2;i<=100000;i++)
if(phi[i]==i)
for(int j=1;j<=100000;j+=i)
{
phi[j]/=i;
phi[j]*=(i-1);
}
in>>n;
for(int i=1;i<=n;i++)
{
in>>x;
y=1LL*2*phi[x]*x;
out<<y<<'\n';
}
return 0;
}