moistx https://blog.hatena.ne.jp/moistx/ Logfiles https://logfiles.hatenablog.com/ SRM 解法 メモ化再帰 class RandomSort { public: map<vector<int>, double> mp; double getExpected(vector <int> permutation) { if(mp.count(permutation)) { return mp[permutation]; } double ret = 0.; double cnt = 0.; for(int i=0; i<permutation.size(); i++) { for(int j=i+1; j<permutation.size(); j++) { if(permutation… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Flogfiles.hatenablog.com%2Fentry%2F20140817%2F1408230696" title="SRM402 Div1Easy RandomSort - Logfiles" 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 2014-08-17 08:11:36 rich https://logfiles.hatenablog.com/entry/20140817/1408230696 1.0 100%