Cod sursa(job #2286927)
Utilizator | Data | 21 noiembrie 2018 00:02:58 | |
---|---|---|---|
Problema | Sum | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.44 kb |
#include <fstream>
using namespace std;
ifstream fin("sum.in");
ofstream gout("sum.out");
int main()
{
int n, i, j, v[100001];
long long x;
fin >> n;
for(i = 2; i <= 100000; i++)
v[i] = i - 1;
for(i = 2; i <= 100000; ++i)
for(j = 2 * i; j <= 100000; j+=i)
v[j] -= v[i];
for (i=1;i<=n;i++)
{
fin >> x;
gout << x*v[x]*2 << '\n';
}
return 0;
}