Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:10:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^ user.cpp:22:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for( int i = 0; i < v[nod].size(); i++ ){ ^ user.cpp:27:36: warning: ‘val’ may be used uninitialized in this function [-Wmaybe-uninitialized] maxim = max( maxim, D[nod] + val + 1 ); ^