Compilare: main.cpp: In function 'int main()': main.cpp:78:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for (int i=1; i<sol.size(); i++) | ~^~~~~~~~~~~ main.cpp:56:8: warning: 'st' may be used uninitialized [-Wmaybe-uninitialized] 56 | dfs(st); | ~~~^~~~ main.cpp:43:9: note: 'st' was declared here 43 | int st; | ^~