Cod sursa(job #467788)
| Utilizator | Data | 30 iunie 2010 16:42:04 | |
|---|---|---|---|
| Problema | Sum | Scor | 100 |
| Compilator | cpp | Status | done |
| Runda | Arhiva de probleme | Marime | 0.5 kb |
#include<stdio.h>
int phi[100001];
void init()
{
for(int i=1;i<=100000;++i)
phi[i]=i;
}
void pregen()
{
for(int i=2;i<=100000;++i)
if(phi[i]==i)
for(int j=i;j<=100000;j+=i)
phi[j]=phi[j]/i*(i-1);
}
void solve()
{
int n,x;
scanf("%d",&n);
for(int i=1;i<=n;++i)
{
scanf("%d",&x);
printf("%lld\n",(long long)2*phi[x]*x);
}
}
int main()
{
freopen("sum.in","r",stdin);
freopen("sum.out","w",stdout);
init();
pregen();
solve();
return 0;
}
