Cod sursa(job #314441)

Utilizator andreioneaAndrei Onea andreionea Data 11 mai 2009 21:05:22
Problema Fractii Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.29 kb
Raporteaza aceasta sursa 
#include<cstdio>
#include<cmath>
long long sum=0;
int n;
int main()
{FILE*f=fopen("fractii.in","r");
 fscanf(f,"%d",&n);
 fclose(f);
 int i;
 sum=2*n-1;
 for(i=2;i<=n;++i)
  sum+=2*((n-i+1)-n/i);
  FILE *g=fopen("fractii.out","w");
  fprintf(g,"%lld",sum);
  fclose(g);
 return 0;
}