Cod sursa(job #458513)

Utilizator paul_gabryelPaul Buda paul_gabryel Data 25 mai 2010 08:45:15
Problema Factorial Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.33 kb
Raporteaza aceasta sursa 

#include<cstdio>
#include<fstream>

using namespace std;

int p;
long long a;

int main ()
{

ifstream in ("fact.in");
freopen("fact.out","w",stdout);

in>>p;
in.close();
if(p==0)
printf("1\n");
else{
for(int i=1,c=1;c<=p;++i,++c,a+=5){
if(i%5==0){
int x=i,pp=0;
while(x%5==0)
x/=5,++pp;
c+=pp;
}
}
printf("%lld\n",a);
}

return 0;}