Cod sursa(job #2432554)
Utilizator | Data | 24 iunie 2019 12:09:04 | |
---|---|---|---|
Problema | Sum | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.44 kb |
#include <fstream>
using namespace std;
ifstream f("sum.in");
ofstream g("sum.out");
const int maxim=100005;
int n,i,j,a,v[maxim];
int main()
{
f>>n;
for(i=1;i<maxim;i++)
{
v[i]=i-1;
}
for(i=2;i<maxim;i++)
{
for(j=2;j<=maxim/i;j++)
{
v[i*j]-=v[i];
}
}
for(i=1;i<=n;i++)
{
f>>a;
g<<1LL*v[a]*2*a<<'\n';
}
return 0;
}