Compilare: main.cpp: In function 'void dfs1(int)': main.cpp:18:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int j=0;j<A[i].size();j++){ | ~^~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:27:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for(int j=0;j<B[i].size();j++){ | ~^~~~~~~~~~~~