n, m = map(int, input().split())
MOD = 998244353
if m <= 33:
    ans = 0
    for i in range(m):
        ans ^= n << i
    print(ans % MOD)
    exit()
d = [n >> i & 1 for i in range(30)]
d2 = [0] * (30 * 2 - 1)
for i in range(30):
    for j in range(30):
        d2[i+j] ^= d[j]
ans = 0
for i in range(30):
    ans |= d2[i] << i
tmp = 0
for i in range(30, 30 * 2 - 1):
    tmp |= d2[i] << (i - 30)
ans += tmp * pow(2, m, MOD)
x = d2[29]
ans += x * (pow(2, m, MOD) - pow(2, 30))
print(ans % MOD)