Compilare: user.cpp: In function ‘void Dfs(int)’: user.cpp:31:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ^ user.cpp: In function ‘void Dfs2(int, int, int)’: user.cpp:48:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ^ user.cpp:58:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[nod][i].b<=maxam) ^