Cod sursa(job #190019)

Utilizator radu_voroneanuVoroneanu Radu Stefan radu_voroneanu Data 19 mai 2008 18:15:24
Problema Sum Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.55 kb
#include <stdio.h>
#define max 100000

long phi[max+1],i,n;
long long j,x;

int main()
 {
        freopen("sum.in","r",stdin);
        freopen("sum.out","w",stdout);
        n=100000;
        for (i=1; i<=n; ++i) phi[i]=i;
        for (i=2; i<=n; ++i)
                if (phi[i]==i)
                        for (j=i; j<=n; j+=i) phi[j]-=phi[j]/i;
        scanf("%ld\n",&n);
	phi[1]=0;
        for (i=1; i<=n; ++i)
         { scanf("%lld\n",&x); j=x*phi[x] << 1; printf("%lld\n",j);}
        fclose(stdin); fclose(stdout);
        return 0;
 }