Cod sursa(job #2506099)
Utilizator | Data | 7 decembrie 2019 15:01:27 | |
---|---|---|---|
Problema | Sum | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.53 kb |
#include <fstream>
using namespace std;
ifstream ci("sum.in");
ofstream co("sum.out");
const int N=100001;
int v[N];
int main()
{
int n, x;
ci >> n;
for(int i=2; i<N; i++)
{
v[i]=i;
}
for(int i=2; i<N; i++)
{
if(v[i]==i)
{
for(int j=i; j<N; j+=i)
{
v[j]=v[j]/i*(i-1);
}
}
}
for(int i=1; i<=n; i++)
{
ci >> x;
co << (long long)v[x]*2*x << "\n";
}
return 0;
}