Cod sursa(job #623248)
| Utilizator | Data | 19 octombrie 2011 16:11:14 | |
|---|---|---|---|
| Problema | Sum | Scor | 70 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.47 kb |
#include <fstream>
using namespace std;
ifstream in("sum.in");
ofstream out("sum.out");
const int N = 100001;
int e[N];
int main()
{
int i,n,j,t;
long long s=0;
in>>n;
for (i = 1;i <= N;++i)
e[i] = i;
for (i = 2;i <= N;++i)
if (e[i] == i)
for (j = i;j <= N;j+=i)
e[j] = e[j] / i * (i-1);
for(i=1;i<=n;i++)
{
in>>t;
out<<e[t]*t*2<<'\n';
}
return 0;
}
