dakutenpura https://blog.hatena.ne.jp/dakutenpura/ A box of chocolate https://dakutenpura.hatenablog.com/ Writeup When I read this problem, I was thinking about Edmonds' algorithm, but it runs in , which is not OK for the last 10 tests. Besides, in graph_generator.py, there are no conditions that guarantee there exists a perfect matching. So, we can't solve this problem that way (or maybe we can, I haven't trie… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fdakutenpura.hatenablog.com%2Fentry%2F2015%2F09%2F07%2F214418" title=" MMA CTF 2015 - Task Perfect Matching - A box of chocolate" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> http://chart.apis.google.com/chart?cht=tx&chl=%7B%20%5Cdisplaystyle%20O%28%20%7CV%7C%5E4%20%29%7D Hatena Blog https://hatena.blog 2015-09-07 21:44:18 rich https://dakutenpura.hatenablog.com/entry/2015/09/07/214418 1.0 100%