nya__nya https://blog.hatena.ne.jp/nya__nya/ メモ帳 https://nyaonn.hatenablog.com/ 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… 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnyaonn.hatenablog.com%2Fentry%2F2021%2F05%2F02%2F015400" title="ABC200-D - メモ帳" 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 2021-05-02 01:54:00 rich https://nyaonn.hatenablog.com/entry/2021/05/02/015400 1.0 100%