Compilare: main.cpp: In function 'int main()': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i=1; i<sol.size(); i++) { | ~^~~~~~~~~~~ main.cpp:43:8: warning: 'st' may be used uninitialized [-Wmaybe-uninitialized] 43 | dfs(st); | ~~~^~~~ main.cpp:31:9: note: 'st' was declared here 31 | int st; | ^~