Cod sursa(job #255109)

Utilizator PavelRazvanPavel Razvan PavelRazvan Data 8 februarie 2009 17:53:12
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.28 kb
Raporteaza aceasta sursa 
#include<stdio.h>
long long unsigned n,k;
int main ()
{
    freopen("fractii.in","r",stdin);
    freopen("fractii.out","w",stdout);
    int i;
    scanf("%llu",&n);
    for(i=3;i<=n;i+=2)
        k+=(n/i);
    k+=((n/2)*(n/2));
    printf("%llu",(n*n)-k);
    return 0;
}