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

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發送短信 : Traffic information sign location problem: Optimization and simulation