Cod sursa(job #880491)
Utilizator | Podaru Mihai XeBlue | Data | 16 februarie 2013 20:37:46 |
---|---|---|---|
Problema | Sum | Scor | 95 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.44 kb |
#include <fstream>
using namespace std;
int e[100001];
ifstream in("sum.in");
ofstream out("sum.out");
int main()
{
int n, i, j, k;
for (i=1;i<100001;++i) e[i] = i-1;
for (i=2;i<100001;++i)
for(j=2*i;j<100001;j+=i)
e[j]-=e[i];
in >> n;
for(i=1;i<=n;i++)
{
in >> k;
out << (long long)e[k]*2*k;
out << "\n";
}
in.close();
out.close();
return 0;
}