發送短信 : Identifying infection sources in a network

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