Compilare: main.cpp: In function 'int main()': main.cpp:42:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ok>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (j = 0; j < adj[i].size(); ++j) | ~~^~~~~~~~~~~~~~~ main.cpp:54:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ok>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (i = 0; i < adj[0].size(); ++i) | ~~^~~~~~~~~~~~~~~