Cod sursa(job #1436708)

Utilizator vladu97Stoian Vlad vladu97 Data 16 mai 2015 12:52:09
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include<iostream>
#include<fstream>

using namespace std;

int main () {
fstream fin("fractii.in");
fstream fout("fractii.out");
long int n, i, j, nr=0;
fin>>n;
long int v[n+1];
v[1]=1;
for (i=2; i<=n; i++){
    v[i]=i;
    for(j=i; j<=n; j+=i)
        v[j]=v[j]*(i-1)/i;
    nr+=v[i];
}
cout<<nr;
return 0;

}