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           __   __    _____    __   __   _    _   
    ___    \ \\/ //  / ____||  \ \\/ // | \  / || 
   /   ||   \ ` //  / //---`'   \ ` //  |  \/  || 
  | [] ||    | ||   \ \\___      | ||   | .  . || 
   \__ ||    |_||    \_____||    |_||   |_|\/|_|| 
    -|_||    `-`'     `----`     `-`'   `-`  `-`  
     `-`

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發送短信 : Theory of probability and mathematical statistics