{"height":"190","provider_name":"Hatena Blog","description":"D - Message from Aliens #include<bits/stdc++.h> using namespace std; using ll = long long; int main(){ string s; cin >> s; deque<char> dq; ll n = s.size(); ll flag = 1; for(ll i=0; i<n; i++){ if(s[i] == 'R'){ flag*=-1; }else{ if(flag == 1){ if(!dq.empty() && s[i] == dq.back()) dq.pop_back(); else dq\u2026","url":"https://nyaonn.hatenablog.com/entry/2021/05/02/015400","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnyaonn.hatenablog.com%2Fentry%2F2021%2F05%2F02%2F015400\" title=\"ABC200-D - \u30e1\u30e2\u5e33\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":[],"type":"rich","width":"100%","title":"ABC200-D","author_name":"nya__nya","published":"2021-05-02 01:54:00","author_url":"https://blog.hatena.ne.jp/nya__nya/","version":"1.0","provider_url":"https://hatena.blog","blog_title":"\u30e1\u30e2\u5e33","blog_url":"https://nyaonn.hatenablog.com/"}