program sqrt_inequality
  integer(8) :: a, b, c
  read(*,*) a, b, c
  if (c-a-b < 0) then
    write(*,'(a)') "No"
    stop
  end if
  if (a*b*4 < (c-a-b)*(c-a-b)) then
    write(*,'(a)') "Yes"
  else
    write(*,'(a)') "No"
  end if
end program sqrt_inequality