Eroare de compilare: user.cpp: In member function ‘void DG::operator+=(DG&)’: user.cpp:36:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k=0; k<other.ind.size(); k++) ^ user.cpp: In member function ‘bool DG::operator<(const DG&)’: user.cpp:51:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pos < v.size() && v[pos] == other.v[pos])pos++; ^ user.cpp: In function ‘int main()’: user.cpp:150:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(tmp.size() + tmp2.size() < Min) ^ user.cpp:154:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<tmp2.size(); i++) ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<DG*, std::vector<DG> >; _Tp = DG]’: /usr/include/c++/4.8/bits/stl_algo.h:2307:70: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<DG*, std::vector<DG> >]’ /usr/include/c++/4.8/bits/stl_algo.h:2338:54: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<DG*, std::vector<DG> >; _Size = int]’ /usr/include/c++/4.8/bits/stl_algo.h:5475:36: required from ‘void std::sort(_RAIter, _RAIter) [with _RAIter = __gnu_cxx::__normal_iterator<DG*, std::vector<DG> >]’ user.cpp:115:34: required from here /usr/include/c++/4.8/bits/stl_algo.h:2269:19: error: passing ‘const DG’ as ‘this’ argument of ‘bool DG::operator<(const DG&)’ discards qualifiers [-fpermissive] while (__pivot < *__last) ^ user.cpp:79:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("colectie.in", "r", stdin); ^ user.cpp:82:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:99:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^