#include <bits/stdc++.h>
using namespace std;
#define int long long
int n;
set<int> s;
int ans = 0;
bool first = false;
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cin>>n;
int arr[n];
for (int i = 0; i<n;i++) {
int t;
cin>>t;
arr[i]=t;
s.insert(t);
}
for (auto &a: s) {
first = false;
for (int i = 0;i<n;i++) {
if (a!=0) {
if (arr[i]==a) {
first = true;
}
if (first and arr[i]<a) {
ans+=1;
first = false;
}
}
}
if (first) {
ans+=1;
}
}
cout<<ans;
return 0;
}
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