#include <iostream>

using namespace std;

int n, a[1000000];
int main(){
// 	freopen("input.txt", "r", stdin);
// 	freopen("output.txt", "w", stdout);

	cin >> n;
	for (int i = 0; i < n; ++i)
	{
		cin >> a[i];
	}
	int ans = 0, mx = 0;
	for (int i = 1; i < n; ++i)
	{
		if (a[0] == a[i])
		{	
			ans = i + 1; 
			mx = max(mx, ans);
		}
	}

	cout << mx;










	return 0;
}