Compilare: main.cpp: In function 'int main()': main.cpp:65:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < adj[node].size(); i++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:92:5: warning: 'node' may be used uninitialized in this function [-Wmaybe-uninitialized] if(ans.second < ans.first) ^~