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 badd(x, y) return (x + y) % mod end

local n = io.read("*n")
local a = {}
for i = 1, n do
  a[i] = io.read("*n")
end
local dp1, dp2 = {}, {}
-- [-10000, 10000] -> [1, 20001]
for i = 1, 20001 do
  dp1[i] = 0
end
local ofst = 10001
dp1[ofst + 0] = 1
for i = 1, n do
  local src = i % 2 == 1 and dp1 or dp2
  local dst = i % 2 == 1 and dp2 or dp1
  local ai = a[i]
  for j = 1, 20001 do
    dst[j] = 0
  end
  for j = 1 + ai, 20001 do
    dst[j - ai] = badd(dst[j - ai], src[j])
  end
  for j = 1, 20001 - ai do
    dst[j + ai] = badd(dst[j + ai], src[j])
  end
end
local tbl = n % 2 == 1 and dp2 or dp1
local ret = 0
for i = 1, 10000 do
  local v = bmul(ofst - i, tbl[i])
  ret = badd(ret, v)
end
for i = 10002, 20001 do
  local v = bmul(i - ofst, tbl[i])
  ret = badd(ret, v)
end
print(ret)