#include<iostream>
#define f0n for (int i = 0; i < n; i++)
using namespace std;
int main() {
int arr[100], n, maximum = -1e9, max2 = -1e9;
cin >> n;
for (int i = 0; i < n; i++) {
cin >> arr[i];
}
for (int i = 0; i < n; i++) {
maximum = max(maximum, arr[i]);
}
for (int i = 0; i < n; i++) {
if (max2 < arr[i] && arr[i] < maximum) {
max2 = arr[i];
}
}
cout << max2;
}
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