Cod sursa(job #1334611)
| Utilizator | Data | 4 februarie 2015 15:25:04 | |
|---|---|---|---|
| Problema | Sum | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.46 kb |
#include<cstdio>
using namespace std;
int c[100005];
void ciur(int n)
{
int i,j;
for(i=2;i<=n;++i)
{
if(c[i]==i)
{
for(j=i<<1;j<=n;j=j+i)
c[j]=c[j]/i*(i-1);
c[i]=i-1;
}
}
}
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
int n,i,x;
n=100000;
for(i=1;i<=n;++i)
c[i]=i;
ciur(100000);
scanf("%d",&n);
for(i=1;i<=n;++i)
{
scanf("%d",&x);
printf("%lld\n",1LL*2 * x*c[x]);
}
}
