class Solution {
public:
vector<string> removeSubfolders(vector<string>& folder) {
vector<string> res;
sort(folder.begin(), folder.end());
for (auto& f: folder) f += '/';//修改一定要加引用
for (auto& f: folder) {
if (res.empty() || res.back().size() > f.size() || res.back() !=
f.substr(0, res.back().size()))
res.push_back(f);
}
for (auto& s: res) s.pop_back();
return res;
}
};