#33 pow_modを原典準拠にする #45
Merged
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#33
原典とコードをほぼ同じに
mの制約をintに&&でつなぐassertionは複数行のほうが引っかかったときの原因がすぐにわかるのでそうするm=1を場合分け(x=1%mとしてもよい)xの初期値をsafe_modで求める%2,/2を&1,>>>=1として2%高速化(ローカル測定)pow_modの引数の範囲を網羅できているわけではない。