發送短信 : On rainbow vertex antimagic coloring and its application to the encryption keystream construction

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