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

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發送短信 : On an extension of shapiro's cyclic inequality