Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ^ user.cpp:13:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(fiu!=tata) ^ user.cpp: In function ‘int main()’: user.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<L[x].size();j++) ^