Compilare: user.cpp: In function ‘void solve()’: user.cpp:82:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(qq<s) ^ user.cpp: In member function ‘void citire::advance()’: user.cpp:39:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^ user.cpp: In constructor ‘citire::citire(const char*)’: user.cpp:13:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^