Compilare: user.cpp: In function ‘int main()’: user.cpp:155:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( j1 < lst1.size() && i == lst1[j1] ) ^ user.cpp:157:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if( j2 < lst2.size() && i == lst2[j2] ) ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: 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, 4096, fin); ^