Cod sursa(job #1378388)
Utilizator | Data | 6 martie 2015 11:57:23 | |
---|---|---|---|
Problema | Sum | Scor | 85 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.4 kb |
#include <fstream>
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;
}
in>>nrq;
for(i=1;i<=nrq;i++)
{
in>>x;
out<<v[x]<<"\n";
}
return 0;
}