Compilare: main.cpp: In function 'int main()': main.cpp:23:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (i=1; i<=n; i++) ^~~ main.cpp:29:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' f[nod]=1; ^ main.cpp:31:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<L[nod].size(); i++) ~^~~~~~~~~~~~~~