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  ______    _____     _  _      ___     __   __  
 /_____//  |  ___||  | \| ||   / _ \\   \ \\/ // 
 `____ `   | ||__    |  ' ||  | / \ ||   \   //  
 /___//    | ||__    | .  ||  | \_/ ||   / . \\  
 `__ `     |_____||  |_|\_||   \___//   /_//\_\\ 
 /_//      `-----`   `-` -`    `---`    `-`  --` 
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發送短信 : An improvement algorithm on general connectivity computation for VLSI placement