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  _____    __   __   _____      _____     ______  
 /  ___||  \ \\/ // |  __ \\   |  ___||  /_   _// 
| // __     \ ` //  | |  \ ||  | ||__    `-| |,-  
| \\_\ ||    | ||   | |__/ ||  | ||__      | ||   
 \____//     |_||   |_____//   |_____||    |_||   
  `---`      `-`'    -----`    `-----`     `-`'

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發送短信 : Ultra-succinct representation of ordered trees with applications