Cod sursa(job #21441)

Utilizator krisCristina kris Data 23 februarie 2007 15:27:45
Problema Factorial Scor 45
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.26 kb
Raporteaza aceasta sursa 
#include<fstream.h>


main() {
	long n,m,p;
	ifstream f("fact.in");
	ofstream g("fact.out");
	f>>p;
	if(p==1) g<<0;
	if(p%5==0) g<<-1;
	else {
		n=5;

	 while(p) {
		 m=n;
		 while(m%5==0) {m/=5;p--;}
		 n+=5;
	 }
	
	 g<<n-5;
	}
return 0;
}