Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:52:18: error: ‘endl’ was not declared in this scope fout << ans << endl; ^ user.cpp:52:18: note: suggested alternative: In file included from /usr/include/c++/4.8/istream:39:0, from /usr/include/c++/4.8/fstream:38, from user.cpp:4: /usr/include/c++/4.8/ostream:564:5: note: ‘std::endl’ endl(basic_ostream<_CharT, _Traits>& __os) ^ In file included from /usr/include/c++/4.8/numeric:62:0, from /usr/include/c++/4.8/bits/random.tcc:33, from /usr/include/c++/4.8/random:52, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:3: /usr/include/c++/4.8/bits/stl_numeric.h: In instantiation of ‘_Tp std::accumulate(_InputIterator, _InputIterator, _Tp) [with _InputIterator = __gnu_cxx::__normal_iterator<std::vector<int>*, std::vector<std::vector<int> > >; _Tp = int]’: user.cpp:51:53: required from here /usr/include/c++/4.8/bits/stl_numeric.h:127:18: error: no match for ‘operator+’ (operand types are ‘int’ and ‘std::vector<int>’) __init = __init + *__first; ^ /usr/include/c++/4.8/bits/stl_numeric.h:127:18: note: candidates are: In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/algorithm:61, from user.cpp:3: /usr/include/c++/4.8/bits/stl_iterator.h:333:5: note: template<class _Iterator> std::reverse_iterator<_Iterator> std::operator+(typename std::reverse_iterator<_Iterator>::difference_type, const std::reverse_iterator<_Iterator>&) operator+(typename reverse_iterator<_Iterator>::difference_type __n, ^ /usr/include/c++/4.8/bits/stl_iterator.h:333:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/numeric:62:0, from /usr/include/c++/4.8/bits/random.tcc:33, from /usr/include/c++/4.8/random:52, from /usr/include/c++/4.8/bits/stl_algo.h:65, from /usr/include/c++/4.8/algorithm:62, from user.cpp:3: /usr/include/c++/4.8/bits/stl_numeric.h:127:18: note: ‘std::vector<int>’ is not derived from ‘const std::reverse_iterator<_Iterator>’ __init = __init + *__first; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:67:0, from /usr/include/c++/4.8/algorithm:61, from user.cpp:3: /usr/include/c++/4.8/bits/stl_iterator.h:1118:5: note: template<class _Iterator> std::move_iterator<_Iterator> std::operator+(typename std::move_iterator<_Iterator>::difference_type, const std::move_iterator<_Iterator>&) operator+(typename move_iterator<_Iterator>::difference_type __n, ^ /usr/include/c++/4.8/bits/stl_iterator.h:1118:5: note: template argument deduction/substitution failed: In file included from /usr/include/c++/4.8/numeric:62:0, from /usr/include/c++/4.8/bits/random.tcc:33, from /usr/include/c++/4.8/random:52, from /usr/include/c++/4.8/bits/stl_algo.h:65,