Compilare: main.cpp: In function 'std::pair<long long int, std::__cxx11::basic_string<char> > get_tree()': main.cpp:20:19: warning: statement has no effect [-Wunused-value] #define shape second ^ main.cpp:70:6: note: in expansion of macro 'shape' ans.shape ; ^~~~~ main.cpp:97:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(auto it : des) ^~~ main.cpp:103:3: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' dfshape = ""; ^~~~~~~ main.cpp:104:14: warning: 'root' may be used uninitialized in this function [-Wmaybe-uninitialized] dfs((root)); ^