Cod sursa(job #1376358)
Utilizator | Data | 5 martie 2015 17:11:32 | |
---|---|---|---|
Problema | Sum | Scor | 70 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.4 kb |
#include<fstream>
using namespace std;
long n,i,j,p;
int s,v[100001],x;
int main()
{
ifstream f("sum.in");
ofstream g("sum.out");
f>>n;
for(i=1;i<=100000;i++)
v[i]=i;
for(i=2;i<=100000;i++)
if(v[i]==i)
{for(j=2*i;j<=100000;j=j+i)
v[j]=v[j]/i*(i-1);
v[i]=i-1;}
for(i=1;i<=n;i++)
{
f>>x;
g<<2*x*v[x]<<'\n';
}
return 0;
}