MOD=998244353
N,P=map(int,input().split())

def solve(N,P):
    N//=P
    ans=0
    a=1
    while N:
        ans+=a * (N%P)
        ans%=MOD
        a = a*P+1
        N//=P

    return (pow(P, ans, MOD))

print(solve(N,P))