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Cod sursa(job #304334)
#include<stdio.h>
FILE*g=freopen("fact.out","w",stdout);
FILE*f=freopen("fact.in","r",stdin);
long z,p;
void p5(long x)
{while(x%5==0)
{z++;x/=5;
if(z>p)
{break;
printf("%-1\n");}
}}
int main()
{long n;
scanf("%ld",&p);
if(!p)
printf("1\n");
else
{for(n=1;z<p;n++)
p5(5*n);
if(z==p)
printf("%ld\n",5*(n-1));
}
return 0;}