local mod = 998244353
local mfl = math.floor
local function bmul(x, y)
  local x0, y0 = x % 31596, y % 31596
  local x1, y1 = mfl(x / 31596), mfl(y / 31596)
  return (x1 * y1 * 62863 + (x1 * y0 + x0 * y1) * 31596 + x0 * y0) % mod
end

local function modpow(src, pow)
  local res = 1
  while 0LL < pow do
    if pow % 2LL == 1LL then
      res = bmul(res, src)
    end
    src = bmul(src, src)
    pow = pow / 2LL
  end
  return res
end
local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end

local n, k = io.read():match("(%d+) (%d+)")
n = tonumber(n)
k = lltonumber(k)
local v = 0
for i = 1, n do
  v = v + io.read("*n")
end
print(bmul(v % mod, modpow(2, k)))