// Level 1 - Homework 1 - Question E - Solution 2.
#include <iostream>
using namespace std;
int main()
{
int N = 0;
int X = 0;
cin >> N >> X;
int Max = X;
for(int i = 1; i < N; ++i)
{
cin >> X;
if(X > Max)
Max = X;
}
cout << Max << endl;
return 0;
}
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