Cod sursa(job #732712)

Utilizator Stefex09Stefan Teodorescu Stefex09 Data 10 aprilie 2012 19:58:02
Problema Sum Scor 85
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.43 kb
#include<iostream>
#include<fstream>
#define nmax 100010
using namespace std;
int ciur[nmax];
ifstream in("sum.in");
ofstream out("sum.out");
int main()
{
	int n,x,i,j;
	long long rez;
	for(i=1;i<=100000;i++)
		ciur[i]=i;
	for(i=2;i<=100000;i++)
		if(ciur[i]==i)
			for(j=i;j<=100000;j+=i)
				ciur[j]=(long long)ciur[j]*(i-1)/i;
	for(in>>n;n;--n){
		in>>x;
		rez=(long long)ciur[x]*x<<1;
		out<<rez<<"\n";
	}
	return 0;
}