Compilare: user.cpp: In function ‘void adauga_muchii_noi(int, int)’: user.cpp:38:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[childNod].size(); i++) ^ user.cpp:41:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[fatherNode].size(); j++) ^ user.cpp: In function ‘int bfs(int)’: user.cpp:58:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[el].size(); i++) ^ user.cpp:78:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^