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#include <bits/stdc++.h> //Michał Kuśmirek
using namespace std;     //XIII LO Szczecin

#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define REP(i, n) for(int i = 0; i < (n); ++i)

using ll = long long;
using pii = pair<int, int>;

template<class T> int size(T && a) {
	return (int)(a.size());
}
ostream& operator << (ostream &os, string str) {
    for(char c : str) os << c;
    return os;
}
template <class A, class B> ostream& operator << (ostream &os, const pair<A, B> &p) {
	return os << '(' << p.first << "," << p.second << ')';
}
template <class T> auto operator << (ostream &os, T &&x) -> decltype(x.begin(), os) {
	os << '{';
	for(auto it = x.begin(); it != x.end(); ++it)
		os << *it << (it == prev(x.end()) ? "" : " ");
	return os << '}';
}
template <class T> ostream& operator << (ostream &os, vector<vector<T>> vec) {
    for(auto x : vec)
    	os << "\n  " << x;
    return os;
}
void dump() {}
template <class T, class... Args> void dump(T &&x, Args... args) {
    cerr << x << "; ";
    dump(args...);
}
#ifdef DEBUG
# define debug(x...) cerr << "[" #x "]: ", dump(x), cerr << '\n'
#else 
# define debug(...) 0
#endif

//--------------------------------------------------

bool possible(vector<int> a) {
	int n = size(a);
	if(size(a) == 1)
		return false;
	if(a[0] == a.back())
		return true;

	vector<int> vec1;
	REP(i, n - 2) {
		vec1.emplace_back(a[i]);
		vector<int> vec2;
		FOR(j, i + 1, n - 1)
			vec2.emplace_back(a[j]);

		if(possible(vec1) and possible(vec2))
			return true;
	}

	return false;
}

int m, n, ans;
vector<int> vec;
void bt() {
	if(size(vec) == n) {
		if(possible(vec))
			++ans;
		return;
	}

	REP(i, m) {
		vec.emplace_back(i);
		bt();
		vec.pop_back();
	}
}

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

	cin >> n >> m;

	bt();
	cout << ans << '\n';
}