Cod sursa(job #130003)

Utilizator drywaterLazar Vlad drywater Data 30 ianuarie 2008 20:16:57
Problema Factorial Scor 10
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.36 kb
Raporteaza aceasta sursa 
#include <stdio.h>
FILE *in,*o;
long p,s,i;
unsigned long long n,q;
int main()
{
in=fopen("fact.in","r");
o=fopen("fact.out","w");
fscanf(in,"%ld",&p);
if (p!=0)
 {
 n=p*5;
 s=25;
 i=1;
 q=n;
 while (i<=11 && s<=q)
  {
  n=n-(q/s)*i;
  s=s*5;
  i++;
  }
 fprintf(o,"%llu",n);
 }
 else fprintf(o,"1");
fclose(in);
fclose(o);
return 0;
}