Cod sursa(job #731838)
Utilizator | Data | 9 aprilie 2012 12:03:05 | |
---|---|---|---|
Problema | Sum | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.34 kb |
#include <fstream>
#define L 100005
#define ll long long
using namespace std;
ifstream F("sum.in");
ofstream G("sum.out");
ll n,i,j,x;
int v[L];
int main()
{
F>>n;
for( i=1;i<=L;i++ )
v[i]=i-1;
for( i=2; i<=L; i++ )
for( j=i+i; j<=L ;j+=i )
v[j]-=v[i];
for(i=1;i<=n;++i,F>>x)
G<< (ll) 2*v[x]*x<<"\n";
}