Submission #2211932

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Source Code Expand

#include <iostream>
#include <string>
using namespace std;

string ans;

void make() {
	if (ans[ans.size() - 1] == 'a')ans += "b";
	else if (ans[ans.size() - 1] == 'b')ans += "c";
	else if (ans[ans.size() - 1] == 'c')ans += "a";
}

int main() {
	int n; cin >> n;
	int m = (n - 1) / 2;
	string s; cin >> s;
	if (n % 3 == 0) ans = "b";
	if (n % 3 == 1)ans = "a";
	if (n % 3 == 2)ans == "c";
	for (int i = 0; i < 2 * n; i++) {
		make();
	}
	if (s == ans)cout << m << endl;
	else cout << -1 << endl;
	return 0;
}

Submission Info

Judge Result