Cod sursa(job #467788)

Utilizator dushmiMihai-Alexandru Dusmanu dushmi Data 30 iunie 2010 16:42:04
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.5 kb
#include<stdio.h>
int phi[100001];
void init()
{
    for(int i=1;i<=100000;++i)
		phi[i]=i;
}
void pregen()
{
    for(int i=2;i<=100000;++i)
		if(phi[i]==i)
			for(int j=i;j<=100000;j+=i)
				phi[j]=phi[j]/i*(i-1);
}
void solve()
{
    int n,x;
    scanf("%d",&n);
    for(int i=1;i<=n;++i)
	{
		scanf("%d",&x);
		printf("%lld\n",(long long)2*phi[x]*x);
	}
}
int main()
{
	freopen("sum.in","r",stdin);
	freopen("sum.out","w",stdout);
	init();
    pregen();
    solve();
	return 0;
}