Compilare: main.cpp: In function 'bool verif_dfs()': main.cpp:20:21: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 20 | if ( order.size() != 2 * n - 1 ) return false; | ~~~~~~~~~~~~~^~~~~~~~~~~~ main.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for ( int i = 1; i < order.size(); ++i ) { | ~~^~~~~~~~~~~~~~