def bin(N):
    X=[]
    while N:
        X.append(N%2)
        N//=2
    return X

def num(X):
    N=0
    for x in X[::-1]:
        N=2*N+x
    return N

def greedy(N,M):
    X=0
    for _ in range(M):
        X^=N
        N<<=1
    return X%Mod

def solve(N,M):
    if N==0:
        return 0

    b=bin(N)

    Mod=998244353
    if M<=len(b):
        return greedy(N,M)%Mod

    b_inv=b[::-1]

    c=[0]*len(b); d=[0]*len(b)

    for i in range(len(b)):
        if i==0:
            c[i]=b[i]
            d[i]=b_inv[i]
        else:
            c[i]=c[i-1]^b[i]
            d[i]=d[i-1]^b_inv[i]

    d=d[::-1]
    t=M-1-len(b)
    X=num(d)*pow(2,t+len(b),Mod)+c[-1]*(pow(2,t,Mod)-1)*pow(2,len(b),Mod)+num(c)
    return X%Mod

N,M=map(int,input().split())
Mod=998244353

print(solve(N,M))