문제

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

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(0);

	int N, M; // N: row, M: col
	cin >> N >> M;

	if (N == 1) cout << 1 << endl;
	else if (N == 2) cout << min(4, (M + 1) / 2) << endl;
	else {
		if (M < 7) cout << min(4, M) << endl;
		else cout << M - 2 << endl; // 4번째랑 6번째 col으로만 이동 못함
	}

	return 0;
}