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Warning: Trying to access array offset on value of type bool in /home/kkwave/patsukin.com/public_html/wp-content/themes/simplicity2/header-twitter-card.php on line 45 天才数学者「無限の客室に無限の客が泊まっていて満室でも全ての客が隣の部屋に移れば一部屋空く」