Compilare: user.cpp: In function ‘int main()’: user.cpp:97:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < sol.size(); i++) { ^ user.cpp: In function ‘int getInt()’: user.cpp:22:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buf, MAXB, 1, f); ^ user.cpp:30:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, MAXB, 1, f); ^