Cod sursa(job #2127184)
Utilizator | Data | 10 februarie 2018 13:50:12 | |
---|---|---|---|
Problema | Sum | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.44 kb |
#include <fstream>
using namespace std;
ifstream cin ("sum.in");
ofstream cout ("sum.out") ;
int n,f,m,x,s,maxim;
int v[100002];
int main()
{
for(int i=1; i<=100002; i++)
v[i]=i-1;
for(int i=2; i<=50000; i++)
{
for(int j=2*i; j<100002; j+=i)
v[j]-=v[i];
}
for(int i = 1 ; i <= n ; i ++ )
{
cin >> x ;
cout << 1LL * 2 * x * v [ x ] ;
}
return 0;
}