Cod sursa(job #1404125)

Utilizator razvang10Razvan Girboveanu razvang10 Data 27 martie 2015 19:57:41
Problema Fractii Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.32 kb
Raporteaza aceasta sursa 
#include <iostream>
#include<fstream>
using namespace std;
int t[1000],k=0,n;
int main()
{
    ifstream ifs( "fractii.in" );
    ofstream ofs("fractii.out");
    ifs>>n;
    for(int i=2;i<=n;i++)
    {
        t[i]+=i-1;
        for(int j=i+i;j<=n;j+=i)t[j]-=t[i];
        k+=t[i];
    }
    ofs<<k*2+1;
}