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

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發送短信 : On element-connectivity preserving graph simplification