foo.cc: In function 'int openLock(std::vector<std::__cxx11::basic_string<char> >&, std::string)':
foo.cc:34:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   34 |   auto [status, step] = q.front();
      |        ^

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Found 20 testcases.
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