Function main

codes/cpp/Code_2_04_3.cpp:7–21

long long Answer = 0;

int main() {
	// ����
	cin >> N >> S;

	// ���������߂�
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			if (i + j <= S) Answer += 1;
		}
	}

	// �o��
	cout << Answer << endl;
	return 0;
}