自己写

#include <iostream>
using namespace std;
long long n, a = 0, b;

int main() {
	cin >> n;

	for (int i = 0; i < n; i++) {
		b = a;
		cin >> a;
		if (a <= b) {
			cout << b;
			return 0;
		}
	}
	cout << a;
	return 0;
}