function split(text, delimiter)
  if text.find(text, delimiter) == nil then
    return { text }
  end 

  local splited_texts = {}
  local last_position

  for splited_text, position in text:gmatch("(.-)"..delimiter.."()") do
    table.insert(splited_texts, splited_text)
    last_position = position
  end 
  table.insert(splited_texts, string.sub(text, last_position))
  return splited_texts
end

local a = io.read()
local list = split(a, " ")
local have_money = tonumber(list[1]) + tonumber(list[2])
local price = tonumber(list[3])

if (have_money-price) > 0 then
    print("Yes")
else
    print("No")
end