Compilare: main.cpp: In function 'int main()': main.cpp:39:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<n;i++) ^~~ main.cpp:42:7: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' nd[b].push_back(a); ^~ main.cpp:50:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<vh.size();j++) ~^~~~~~~~~~ main.cpp:63:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=1;j<vh.size();j++) ~^~~~~~~~~~