Cod sursa(job #877729)
Utilizator | Data | 13 februarie 2013 08:47:00 | |
---|---|---|---|
Problema | Sum | Scor | 100 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.48 kb |
#include <iostream>
#include <fstream>
#define N 100001
using namespace std;
int x,n,i,j,v[N];
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
scanf("%d",&n);
for(i=2;i<N;i++)
v[i]=i;
for(i=2;i<N;i++)
if(v[i]==i)
for(j=i;j<N;j+=i)
v[j]=v[j]/i*(i-1);
for(i=1;i<=n;i++)
{
scanf("%d",&x);
printf("%lld\n",(long long)v[x]*2*x);
}
return 0;
}