#include<bits/stdc++.h>
using namespace std;
int n,a[10086],cnt;
int main()
{
cin>>n;
for(int i=1;i<=n;i++)
cin>>a[i];
while(1)
{
int maxn=1,minn=1,k=1,j=1;
for(int i=1;i<=n;i++)
{
if(a[i]>=maxn)
{
k=i;
maxn=a[i];

}
if(a[i]>0&&a[i]<=minn)
{
j=i;
minn=a[i];
}
}
if(a[k]==0)
break;
a[k]-=a[j];
cnt++;
}
cout<<cnt;
return 0;
}