Cod sursa(job #702834)
Utilizator | Data | 2 martie 2012 09:33:52 | |
---|---|---|---|
Problema | Sum | Scor | 70 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.38 kb |
#include <stdio.h>
using namespace std;
FILE*f=fopen("sum.in","r");
FILE*g=fopen("sum.out","w");
long long n,x,v[100001],i,j,a;
int main()
{fscanf(f,"%d",&n);
for(i=1;i<100001;i++)
v[i]=i-1;
for(i=2;i<100001;i++)
for(j=2*i;j<100001;j+=i)
v[j]-=v[i];
for(i=1;i<=n;i++)
{
fscanf(f,"%d",&x);
a=2;
a=a*x*v[x];
fprintf(g,"%d\n",a);
}
return 0;
}