N,M = map(int, input().split())
mod = 998244353
BITN = format(N,'b')
bitnlen = len(BITN)
if M>len(BITN):
    HIGH = []
    temp = 0
    for b in BITN:
        temp^=int(b)
        HIGH.append(temp)
    LOWr = []
    temp = 0
    for b in BITN[::-1]:
        temp^=int(b)
        LOWr.append(temp)

    ans = 0
    for i in range(bitnlen):
        ans += LOWr[i]*pow(2,i,mod)
    for i in range(bitnlen):
        ans += HIGH[i]*pow(2,bitnlen+M-2-i,mod)
    if BITN.count('1')%2==1:
        ans += pow(2,M-1,mod)-pow(2,bitnlen,mod)
else:
    ans = 0
    for i in range(M):
        ans^=N*pow(2,i)
print(ans%mod)