#include <vector>
#include <iostream>
//#include <gtest/gtest.h>

using std::vector;

int conquer(vector<int> &a, int b, int c, int left, int right) {
	int countB = 0;
	int countC = 0;
	for (int i = left; i < right + 1; i++) {
		if (a[i] == b)
			countB++;
		if (a[i] == c)
			countC++;
	}
	if (countB > (right - left + 1) / 2)
		return b;
	if (countC > (right - left + 1) / 2)
		return c;
	return -1;
}

int get_majority_element(vector<int> &a, int left, int right) {
	if (left == right)
		return a[left];
	int middle = (right - left) / 2;
	int b = get_majority_element(a, left, left + middle);
	int c = get_majority_element(a, left + middle + 1, right);
	int d = conquer(a, b, c, left, right);
	return d;
}
//TEST(MajorityElement, test1) {
//	vector<int> a = { 1, 1 };
//	ASSERT_EQ(get_majority_element(a, 0, a.size()-1), 1);
//}

int main() {
	int n;
	std::cin >> n;
	vector<int> a(n);
	for (size_t i = 0; i < a.size(); ++i) {
		std::cin >> a[i];
	}
	std::cout << (get_majority_element(a, 0, n - 1) != -1) << '\n';
}