Cod sursa(job #711395)

Utilizator venom4u31Manea Constantin venom4u31 Data 12 martie 2012 01:01:51
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 
#include <stdio.h>
#include <stdlib.h>
using namespace std;

int main()
{
    FILE *f, *g;
    f=fopen("fractii.in", "r");
    g=fopen("fractii.out", "w");
    unsigned long long int n,i,s;
    fscanf(f, "%llu", &n);
    s=n*n;
    for(i=2;i<=n/2;i++)
        s-=2*n/i;
    fprintf(g, "%llu", s-n-2);
    return 0;
}