Compilare: user.cpp: In function ‘bool dfs(int)’: user.cpp:14:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i ++ ){ ^ user.cpp: In function ‘int main()’: user.cpp:42:10: warning: unused variable ‘x’ [-Wunused-variable] bool x = dfs( 1 ); ^ user.cpp: In function ‘bool dfs(int)’: user.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type] } ^