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#include <bits/stdc++.h>
using namespace std;
ifstream f("zero2.in");
ofstream g("zero2.out");
int64_t b,n,nr,c,m;
int main()
{
for(int i=1;i<=10;i++)
{
nr=0;
f>>b>>n;
if(b==10)
{
for(int i=1;i<=n;i++)
if(i%5==0)
{
int j=i;
while(j%5==0)
{
j/=5;
nr++;
}
}
g<<nr<<'\n';
}
else
{
nr=0;
int64_t p=1;
for(int i=1;i<=n;i++)
p*=i;
while(n)
{
c=n%10;
m=m+c*p;
p=p*b;
n/=10;
}
while(n%10!=0)
{
n/=10;
nr++;
}
g<<nr<<'\n';
}
}
return 0;
}