Compilare: main.cpp: In function 'void dfs(int)': main.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0; i<g[nod].size(); i++) { | ~^~~~~~~~~~~~~~