xrekkusu https://blog.hatena.ne.jp/xrekkusu/ バランスを取りたい https://xrekkusu.hatenablog.jp/ CTF --- English version is here (poor English)--- Hi, we have a short survey with 50 questions. You can get a flag as award once you finished it. $ nc 104.197.7.111 13135 問題文によれば、50問問題を解けばフラグをくれるらしい。簡単っぽい？最初の10問は四則演算の結果が整数か否かを答える問題。 次に、 Description: The prime numbers. The sequence starts with: 2,3,5,7,1… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fxrekkusu.hatenablog.jp%2Fentry%2F2015%2F03%2F23%2F144118" title=" BCTF 2015 experiment - バランスを取りたい" 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 2015-03-23 14:41:18 rich https://xrekkusu.hatenablog.jp/entry/2015/03/23/144118 1.0 100%