#include
#include
using namespace std;
int maxvalue(int a[], int n)
{
int largest = INT_MIN;
for (int i = 0; i < n; i++)
{
if (a[i] > largest)
largest = a[i];
}
return largest;
}
int main()
{
int arr[1000],n,N;
cin>>n;
for(int i=0;i<n;i++)
{
cin>>N;
}
cout<<maxvalue(arr, n);
return 0;
}