Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:16:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < vecini[nod].size(); i++){ ^ user.cpp: In function ‘int main()’: user.cpp:29:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &N, &M); ^ user.cpp:34:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^