tanakaBox https://blog.hatena.ne.jp/tanakaBox/ ボクノス https://boxnos.hatenablog.com/ Ruby たまには違う言語もいいよね。Problem 13 - PukiWiki 以下の50桁の数字100個の総和の上位10桁を求めよ。37107287533902102798797998220837590246510135740250 46376937677490009712648124896970078050417018260538 74324986199524741059474233309513058123726617309629 ... 簡単。 #!/usr/bin/ruby sum = 0 STDIN.each {|l| sum += l.to_i} puts sum.to_s[0..9] え… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080403%2F1207191505" title=" Problem 13 - ボクノス" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> Hatena Blog https://hatena.blog 2008-04-03 11:58:25 rich https://boxnos.hatenablog.com/entry/20080403/1207191505 1.0 100%