local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

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

a, b = io.read():match("(%d+) %-?(%d+)")
a = lltonumber(a)
b = lltonumber(b)
print(a < b and "Yes" or "No")