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 ______    _    _    __   __    ______    _  _   
|      \\ | || | ||  \ \\/ //  /_   _//  | \| || 
|  --  // | || | ||   \   //    -| ||-   |  ' || 
|  --  \\ | \\_/ ||   / . \\    _| ||_   | .  || 
|______//  \____//   /_//\_\\  /_____//  |_|\_|| 
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發送短信 : Generation maintenance scheduling for multi-are a system with transmission constraints