Compilare: user.cpp: In function ‘int dfs_cnt(int)’: user.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adj[nod].size(); i++) ^ user.cpp: In function ‘int euler(int)’: user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < adj[next].size(); j++) ^ user.cpp:48:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adj[nod].size(); i++) ^ user.cpp:57:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < adj[next].size(); j++) ^ user.cpp:86:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp:56:42: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] int cnt = dfs_cnt(next), poz; ^