Compilare: user.cpp: In function ‘void bfs()’: user.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); ++i) { ^ user.cpp: In function ‘void rev_bfs()’: user.cpp:60:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < node->words.size(); ++j) ^ user.cpp: In function ‘int main()’: user.cpp:73:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s %d ", text, &n); ^ user.cpp:75:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s ", word); ^