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pythonとperlそれぞれでの数値の桁数の数えかた
pythonのやつの考え方は数学的に参考になる
pythonの場合
import math
# data の桁数を取得する
data_size = int (math.log10(data) + 1)
perlの場合
# $x の桁数を取得する
$count = $x =~ tr/0-9/0-9/;
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