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 = io.read()
n = lltonumber(n)
local z = n
local mul = 1LL
while 0LL < z do
  if z % 2LL == 1LL then mul = mul * 2LL end
  z = z / 2LL
end
local ans = n + 1 - mul
ans = tostring(ans):gsub("LL", "")
print(ans)