Cod sursa(job #2788215)
Utilizator | Data | 25 octombrie 2021 12:04:33 | |
---|---|---|---|
Problema | Sum | Scor | 100 |
Compilator | cpp-64 | Status | done |
Runda | Arhiva de probleme | Marime | 0.36 kb |
#include<fstream>
using namespace std;
ifstream F("sum.in");
ofstream G("sum.out");
#define N 100001
int i,j,n,x,e[N];
int main()
{
for(i=2;i<N;++i)
e[i]=i;
for(i=2;i<N;++i)
if(e[i]==i)
for(j=i;j<N;j+=i)
e[j]=e[j]/i*(i-1);
for(F>>n,i=1;i<=n;++i)
F>>x,G<<1LL*e[x]*2*x<<'\n';
return 0;
}