Compilare: main.cpp: In function 'void dfs(int)': main.cpp:14:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for( int i = 0 ; i < v[nod].size(); i++ ){ | ~~^~~~~~~~~~~~~~~ main.cpp:21:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for( int i = 0 ; i < v[nod].size(); i++ ) | ~~^~~~~~~~~~~~~~~