Compilare: user.cpp: In function ‘int dfs(int)’: user.cpp:32:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[nod].size(); i++) ^ user.cpp:40:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < L[nod].size(); i++) ^ user.cpp:31:9: warning: unused variable ‘c’ [-Wunused-variable] int c=1; ^ user.cpp:47:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^