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

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發送短信 : Upper bounds of Ramsey numbers