Eroare de compilare: user.cpp: In function ‘void mergeGroups(std::map<int, std::pair<std::set<int>, std::set<int> > >&, const std::pair<int, std::set<int> >&, std::vector<int>&)’: user.cpp:77:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < intersection.size(); i++) ^ user.cpp: At global scope: user.cpp:97:48: warning: ‘evaluateDeposit’ function uses ‘auto’ type specifier without trailing return type [enabled by default] auto evaluateDeposit(map<int, set<int>>& pieces) ^ user.cpp: In function ‘int main()’: user.cpp:146:42: error: cannot bind ‘std::ostream {aka std::basic_ostream<char>}’ lvalue to ‘std::basic_ostream<char>&&’ cout << evaluateDeposit(depositPieces); ^ In file included from /usr/include/c++/4.8/iostream:39:0, from user.cpp:1: /usr/include/c++/4.8/ostream:602:5: error: initializing argument 1 of ‘std::basic_ostream<_CharT, _Traits>& std::operator<<(std::basic_ostream<_CharT, _Traits>&&, const _Tp&) [with _CharT = char; _Traits = std::char_traits<char>; _Tp = std::map<int, std::pair<std::set<int>, std::set<int> > >]’ operator<<(basic_ostream<_CharT, _Traits>&& __os, const _Tp& __x) ^