Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<l[nod].size();i++){ ^ user.cpp:10:11: warning: variable ‘ok’ set but not used [-Wunused-but-set-variable] int i,ok,j,sum,vecin; ^ user.cpp: In function ‘int main()’: user.cpp:36:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&n,&k); ^ user.cpp:38:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin,"%d%d",&aa,&b); ^