Cod sursa(job #156139)
Utilizator | Data | 12 martie 2008 13:06:29 | |
---|---|---|---|
Problema | Fractii | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.36 kb |
#include <stdio.h>
FILE *f,*g;
long n,nd,contor,nr,d;
int main() {
f=fopen("fractii.in" , "r");
g=fopen("fractii.out" , "w");
fscanf(f, "%ld" , &n);
fclose(f);
contor=3;
for(nr=n;nr>=3;nr--){nd=0;
for(d=2;d<=n/2;d++)if(nr%d==0)nd++;
contor=contor+(nr-1-nd)*2;}
fprintf(g,"%ld", contor);
fclose(g);
return 0;
}