#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin >> n;
vector<int> ted(n);
for(int i = 0; i < n; i++)
{ cin >> ted[i];
}
sort( ted.begin(), ted.end());
cout<< ted[n-1];
return 0;
}
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