Compilare: main.cpp: In function 'int main()': main.cpp:41:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<elem>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(int i=0;i<g[nod].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp:54:1: warning: this 'else' clause does not guard... [-Wmisleading-indentation] 54 | else | ^~~~ main.cpp:56:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else' 56 | return 0; | ^~~~~~