Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:72: error: no match for ‘operator=’ in ‘((std::vector<bigint, std::allocator<bigint> >*)comb.std::vector<_Tp, _Alloc>::operator[] [with _Tp = std::vector<bigint, std::allocator<bigint> >, _Alloc = std::allocator<std::vector<bigint, std::allocator<bigint> > >](((unsigned int)l)))->std::vector<_Tp, _Alloc>::operator[] [with _Tp = bigint, _Alloc = std::allocator<bigint>](((unsigned int)j)) = ((bigint*)((std::vector<bigint, std::allocator<bigint> >*)comb.std::vector<_Tp, _Alloc>::operator[] [with _Tp = std::vector<bigint, std::allocator<bigint> >, _Alloc = std::allocator<std::vector<bigint, std::allocator<bigint> > >](((unsigned int)(l ^ 1))))->std::vector<_Tp, _Alloc>::operator[] [with _Tp = bigint, _Alloc = std::allocator<bigint>](((unsigned int)j)))->bigint::operator+(((bigint&)((bigint*)((std::vector<bigint, std::allocator<bigint> >*)comb.std::vector<_Tp, _Alloc>::operator[] [with _Tp = std::vector<bigint, std::allocator<bigint> >, _Alloc = std::allocator<std::vector<bigint, std::allocator<bigint> > >](((unsigned int)(l ^ 1))))->std::vector<_Tp, _Alloc>::operator[] [with _Tp = bigint, _Alloc = std::allocator<bigint>](((unsigned int)(j + -0x00000000000000001))))))’ user.cpp:11: note: candidates are: bigint& bigint::operator=(const bigint&)