Compilare: main.cpp: In function 'void dfs(int)': main.cpp:8:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:21:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int i=1;i<=p;i++) ^~~ main.cpp:23:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(int i=1;i<=n;i++)if(!viz[i])k++; ^~~