#include <bits/stdc++.h>
using namespace std;
int main () {
	int n, a[100010], maxx = -114514;
	bool flag = false;
	cin >> n;
	cin >> a[1];
	for (int i = 2; i <= n; i++) {
		cin >> a[i];
		if (a[i] != a[i - 1]) {
			flag = true;
		}
	}
	if (flag)
	cout << n - 1;
	else {
		cout << 0;
	}
	return 0;
}