Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:10:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ^ user.cpp: In function ‘void dfss(int, int)’: user.cpp:18:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:71:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(ii=0;ii<T[a].size();ii++){ ^ user.cpp:29:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&n,&m); ^ user.cpp:31:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^ user.cpp:34:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^