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 __   __    _____      _____    _____    _____    
 \ \\/ //  |  ___||   / ___//  |  ___|| |  __ \\  
  \   //   | ||__     \___ \\  | ||__   | |  \ || 
  / . \\   | ||__     /    //  | ||__   | |__/ || 
 /_//\_\\  |_____||  /____//   |_____|| |_____//  
 `-`  --`  `-----`  `-----`    `-----`   -----`

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發送短信 : A note on the monotonicity of the ES-algorithm