Compilare: main.cpp: In function 'int main()': main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (i = 0; i < rez.size(); ++i) | ~~^~~~~~~~~~~~ main.cpp: In function 'void dfs(int)': main.cpp:51:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (i = 0; i < l[vf].size(); ++i) | ~~^~~~~~~~~~~~~~