Compilare: main.cpp: In function 'int main()': main.cpp:31:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (int i=1; i<=n; ++i) ^~~ main.cpp:34:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' f >> m; ^ main.cpp:64:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<G[nod].size(); ++i) ~^~~~~~~~~~~~~~