Cod sursa(job #460157)

Utilizator ncbllrNegrii Costin ncbllr Data 1 iunie 2010 14:06:57
Problema Factorial Scor 50
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.29 kb
Raporteaza aceasta sursa 
#include<iostream.h>
#include<stdio.h>

long n,i,j;
int main()
{
	freopen("fact.in","r",stdin);
//
	freopen("fact.out","w",stdout);
	cin>>n;
	
	for(i=5; n > j;i=i+5)
	{
		int k = i;
        while( k % 5 == 0)
			k/=5, j++;
	}
	i = i - 5;
	if( n != j)
		i = -1;
	cout<<i;
}