Compilare: main.cpp: In function 'int bfs(int)': main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(i=0; i<g[x].size(); i++) | ~^~~~~~~~~~~~ main.cpp:31:17: warning: unused variable 'j' [-Wunused-variable] 31 | int j=g[x][i]; | ^