Compilare: user.cpp: In function ‘int main()’: user.cpp:68:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (main_q.size() + aux_q.size() >= m) { ^ user.cpp: In function ‘char nextch()’: user.cpp:18:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, BMAX, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:48:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scandura.in", "r", stdin); ^ user.cpp:49:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("scandura.out", "w", stdout); ^