Cod sursa(job #765999)
| Utilizator | Data | 9 iulie 2012 22:42:43 | |
|---|---|---|---|
| Problema | Sum | Scor | 70 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.52 kb |
#include <cstdio>
using namespace std;
const int N = 100010;
int n, x;
int p[N];
void preproceseaza()
{
for(int i = 1; i < N; ++i)
p[i] = i;
for(int i = 2; i < N; ++i)
if(p[i] == i)
for(int j = i; j <= N; j += i)
p[j] = (p[j] / i) * (i - 1);
}
int main()
{
preproceseaza();
freopen ("sum.in", "r", stdin);
freopen ("sum.out", "w", stdout);
scanf("%d", &n);
for(int i = 1; i <= n; ++i) {
scanf("%d", &x);
printf("%d\n", 2 * p[x] * x);
}
}
