Cod sursa(job #2002822)
| Utilizator | Data | 20 iulie 2017 20:59:44 | |
|---|---|---|---|
| Problema | Sum | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.54 kb |
#include <cstdio>
#define MAX 100000
int phi[MAX+5];
void getPhi()
{
for (int i=1; i<=MAX; i++)
phi[i]=i-1;
for (int i=2; i<=MAX; i++)
for (int j=2*i; j<=MAX; j+=i)
phi[j]-=phi[i];
}
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
getPhi();
int n,x;
scanf("%d",&n);
for (int i=1; i<=n; i++)
{
scanf("%d",&x);
printf("%lld\n",2LL*phi[x]*x);
///sunt phi[x] nr.,
///m.aritm.=x
}
return 0;
}
