Cod sursa(job #1378398)
| Utilizator | Data | 6 martie 2015 11:59:19 | |
|---|---|---|---|
| Problema | Sum | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.46 kb |
#include <fstream>
#include <cstdio>
using namespace std;
const int n=100001;
long long v[n];
ifstream in("sum.in");
ofstream out("sum.out");
int main()
{
int nrq,x,i,j;
for(i=1;i<n;i++) v[i]=i-1;
for(i=2;i<n;i++)
{
for(j=i<<1;j<n;j+=i) v[j]-=v[i];
v[i]*=i<<1;
}
freopen ("sum.out","w",stdout);
in>>nrq;
for(i=1;i<=nrq;i++)
{
in>>x;
printf("%lld\n",v[x]);
}
return 0;
}
