#include <bits/stdc++.h>
using namespace std::literals::string_literals;
using i64 = long long;
using std::cout;
using std::endl;
using std::cin;

template<typename T>
std::vector<T> make_v(size_t a){return std::vector<T>(a);}

template<typename T,typename... Ts>
auto make_v(size_t a,Ts... ts){
  return std::vector<decltype(make_v<T>(ts...))>(a,make_v<T>(ts...));
}

int main() {
	// input
	int n; scanf("%d", &n);
	assert(1 <= n and n <= (int)1e5);

	std::vector<int> a(n);
	for(int i = 0; i < n; i++) {
		scanf("%d", &a[i]);

		assert(1 <= a[i] and a[i] <= (int)1e5);
	}

	// solve
	int ans = 0;
	for(int i = 0; i < (1 << n); i++) {
		int latte = 0, tmp = 0, buf = 0;
		for(int j = 0; j < n; j++) {
			if(i >> j & 1) {
				if(tmp == a[j]) buf++;
				else if(tmp < a[j]) {
					tmp = a[j];
					buf = 1;
				}
			} else {
				latte += buf;
				tmp = buf = 0;
			}
		}
		latte += buf;

		ans = std::max(ans, latte);
	}
	printf("%d\n", ans);
	return 0;
}