Cod sursa(job #2102326)
Utilizator | Data | 8 ianuarie 2018 17:47:52 | |
---|---|---|---|
Problema | Pairs | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.53 kb |
#include <stdio.h>
using namespace std;
int phi[100002];
int main()
{
freopen("sum.in", "r", stdin);
freopen("sum.out", "w", stdout);
for(int i=1; i<=100002; i++)
{
phi[i]=i-1;
}
for(int i=2; i<100002; i++)
{
for(int j=i*2; j<100002; j+=i)
{
phi[j]-=phi[i];
}
}
int n;
scanf("%d", &n);
while(n--)
{
int valuare;
scanf("%d", &valuare);
printf("%lld\n", 1LL*2*valuare*phi[valuare]);
}
return 0;
}