Cod sursa(job #2102261)
Utilizator | Data | 8 ianuarie 2018 16:36:18 | |
---|---|---|---|
Problema | Sum | Scor | 55 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.47 kb |
#include <bits/stdc++.h>
using namespace std;
int phi[100002];
int main()
{
freopen("sum.in", "r", stdin);
freopen("sum.out", "w", stdout);
for(int i=1;i<=100002;i++)
phi[i]=i-1;
for(int i=2;i<100002;i++)
for(int j=i*2;j<100002;j+=i)
phi[j]-=phi[i];
int n;
cin>>n;
while(n--)
{
int valuare;
cin>>valuare;
cout<<1LL*2*valuare*phi[valuare]<<'\n';
}
return 0;
}