In file included from /in/Compile/check.cpp:6:
/in/sokoban.hpp:326:27: error: use of undeclared identifier 'to_string'; did you mean 'std::to_string'?
    string state_string = to_string(state.robotRow) + to_string(state.robotCol);
                          ^~~~~~~~~
                          std::to_string
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/basic_string.h:6430:3: note: 'std::to_string' declared here
  to_string(unsigned long __val)
  ^
In file included from /in/Compile/check.cpp:6:
/in/sokoban.hpp:326:55: error: use of undeclared identifier 'to_string'; did you mean 'std::to_string'?
    string state_string = to_string(state.robotRow) + to_string(state.robotCol);
                                                      ^~~~~~~~~
                                                      std::to_string
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/basic_string.h:6430:3: note: 'std::to_string' declared here
  to_string(unsigned long __val)
  ^
In file included from /in/Compile/check.cpp:6:
/in/sokoban.hpp:329:25: error: use of undeclared identifier 'to_string'; did you mean 'std::to_string'?
        state_string += to_string(box.first) + to_string(box.second);
                        ^~~~~~~~~
                        std::to_string
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/basic_string.h:6430:3: note: 'std::to_string' declared here
  to_string(unsigned long __val)
  ^
In file included from /in/Compile/check.cpp:6:
/in/sokoban.hpp:329:48: error: use of undeclared identifier 'to_string'; did you mean 'std::to_string'?
        state_string += to_string(box.first) + to_string(box.second);
                                               ^~~~~~~~~
                                               std::to_string
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/basic_string.h:6430:3: note: 'std::to_string' declared here
  to_string(unsigned long __val)
  ^
In file included from /in/Compile/check.cpp:6:
/in/sokoban.hpp:630:88: error: no template named 'greater'; did you mean 'std::greater'?
    priority_queue<pair<int, shared_ptr<Stage>>, vector<pair<int, shared_ptr<Stage>>>, greater<>> openSet;
                                                                                       ^~~~~~~
                                                                                       std::greater
/usr/bin/../lib/gcc/x86_64-linux-gnu/7.5.0/../../../../include/c++/7.5.0/bits/stl_function.h:371:12: note: 'std::greater' declared here
    struct greater : public binary_function<_Tp, _Tp, bool>
           ^
5 errors generated.
/in/Compile/Makefile:16: recipe for target 'main' failed
make: *** [main] Error 1