Cod sursa(job #1768526)
Utilizator | Data | 1 octombrie 2016 00:41:08 | |
---|---|---|---|
Problema | Sum | Scor | 40 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.39 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("sum.in");
ofstream g("sum.out");
int n,x;
int gcd(int x,int y)
{
if(y==0) return x;
else return gcd(y,x%y);
}
void sum(int n)
{
int s=0,i,nr=0;
for(i=1;i<n;i++)
if(gcd(n,i)==1) nr++;
g<<2*n*nr<<endl;
}
int main()
{
f>>n;
while(n--)
{
f>>x;
sum(x);
}
return 0;
}