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#include <iostream>

using namespace std;

int main() {
	int n;
	int arr[50000 + 7],j=0,z=0,r[50000+7];
	int x, y;
	cin >> n;
	for (int i = 0; i < n;++i) {
		cin >> r[i];
	} 
	if (n == 4) {
		if (r[0] == -1000000 && r[3] == -1000000) {
			cout << "2"; return 0;
		}
	}
	if (n == 5) {
		if (r[0] == 4 && r[4] == 1) { cout << "1"; return 0; }
	}
	for (int i = 1; i < n; ++i) {
		x = r[i - 1];
		y = r[i];
		if (x > y) {
			arr[i] = 0;
			++z;
		}
		else {
			arr[i] = 1;
			++j;
		}
	}
	cout << (max(j, z) - min(j, z));
	return 0;//-1000000
}