class Fenwick_Tree:
    def __init__(self, n):
        self._n = n
        self.data = [0] * n

    def add(self, p, x):
        assert 0 <= p < self._n
        p += 1
        while p <= self._n:
            self.data[p - 1] += x
            self.data[p - 1] %= mod
            p += p & -p

    def sum(self, l, r):
        assert 0 <= l <= r <= self._n
        return self._sum(r) - self._sum(l)

    def _sum(self, r):
        s = 0
        while r > 0:
            s += self.data[r - 1]
            s %= mod
            r -= r & -r
        return s % mod
    
    def get(self, k):
        k += 1
        x, r = 0, 1
        while r < self._n:
            r <<= 1
        len = r
        while len:
            if x + len - 1 < self._n:
                if self.data[x + len - 1] < k:
                    k -= self.data[x + len - 1]
                    x += len
            len >>= 1
        return x
    
    
N, K = map(int, input().split())
inv = [1] * (N + 1)
mod = 998244353
for i in range(1, N + 1):
    inv[i] = pow(i, mod - 2, mod)

# pre = [0] * (N + 1)
# pre[0] = 1
pre = Fenwick_Tree(N + 1)
ans = 0
pre.add(0, 1)
pre.add(1, -1)
for k in range(K):
    now = Fenwick_Tree(N + 1)
    for i in range(N):
        # for j in range(i + 1, N + 1):
        #     now[j] += inv[N - i] * pre[i]
        v = inv[N - i] * pre.sum(0, i + 1) % mod
        now.add(i + 1, v)
        ans += v
        ans %= mod
    pre, now = now, pre
    
print(ans)