Cod sursa(job #1040029)
Utilizator | Data | 23 noiembrie 2013 21:18:15 | |
---|---|---|---|
Problema | Sum | Scor | 70 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.51 kb |
#include<stdio.h>
using namespace std;
int main()
{ int i,n,a,phi[100005],j;
for(i=1;i<=100000;++i) phi[i]=i;
for(i=2;i<=100000;++i)
if(phi[i]==i)
for(j=i;j<=100000;j+=i)
{
phi[j]/=i;phi[j]*=(i-1);
}
freopen("sum.in","r",stdin);
scanf("%d",&n);
freopen("sum.out","w",stdout);
for(;n;n--)
{
scanf("%d",&a);
printf("%lld\n",phi[a]*2*a*1LL);
}
fclose(stdin);fclose(stdout);
return 0;
}