發送短信

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            ______   _    _      ___    __    __  
  ____     /_   _// | |  | ||   / _ \\  \ \\ / // 
 |    \\    -| ||-  | |/\| ||  | / \ ||  \ \/ //  
 | [] ||    _| ||_  |  /\  ||  | \_/ ||   \  //   
 |  __//   /_____// |_// \_||   \___//     \//    
 |_|`-`    `-----`  `-`   `-`   `---`       `     
 `-`

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發送短信 : An Improved Approximation Algorithm for the s-t Path Movement Problem