Compilare: user.cpp: In function ‘void dfs_max_subarb(int, int)’: user.cpp:33:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[root].size(); i++) { ^ user.cpp: In function ‘void do_heavy_path(int, bool, int, int)’: user.cpp:58:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); i++) { ^ user.cpp:73:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[node].size(); i++) { ^