Compilare: main.cpp: In function 'void go_visit(int, int)': main.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<nod[pos].size();i++) ~^~~~~~~~~~~~~~~~ main.cpp:28:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation] if(last!=0) ^~ main.cpp:30:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if' for(int i=0;i<go.size();i++) ^~~ main.cpp:30:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<go.size();i++) ~^~~~~~~~~~