Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:27:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++){ ^ user.cpp: In function ‘void Bfs()’: user.cpp:41:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:89:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size(); i++){ ^ user.cpp:89:36: warning: ‘nod’ may be used uninitialized in this function [-Wmaybe-uninitialized]