#4 Suffix Arrayの高速化 #38
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Integerのソートはあまりにも重かったので、@suisen氏からいただいたinsertion sort, merge sortを使いsaNaive,saDoublingを高速化。saDoublingが要らない子に・・処遇がわからないのでそのままにしてあります。int配列版のSuffix Arrayを作成するとき座標圧縮するのですが、それを高速化。verify済み。