Cod sursa(job #2871246)

Utilizator eddy_cimpanuCimpanu Eduardo Daniel eddy_cimpanu Data 13 martie 2022 21:02:23
Problema Fractii Scor 0
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;
int main()
{
    ifstream fin("fractii.in");
    ofstream fout("fractii.out");
    long long n,nr=0,i,j;
    fin>>n;
    nr=n-1;
    for(i=2;i<=n/2+1;i++)
    {
        nr=nr+n-i;
        for(j=i*2;j<=n;j=j+i)
            nr--;
    }
    fout<<nr*2+1;
    return 0;
}