escritorios.cpp

#include <bits/stdc++.h>

using namespace std;

int main()
{
	int n;
	cin >> n;

	string s;
	cin >> s;

	int ald_cen = 0;
	int cen_ald = 0;
	for (int i = 0; i < n-1; i++) {

		if (s[i] == 'A' and s[i+1] == 'C') ald_cen++;
		if (s[i] == 'C' and s[i+1] == 'A') cen_ald++;
	}

	if (ald_cen > cen_ald) cout << "SIM\n";
	else cout << "NAO\n";

	return 0;
}