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View Compilation Error

0_0_25624659_15613.cpp:436:20: error: 'i' was not declared in this scope
 int ans[maxn], pos[i];
                    ^
0_0_25624659_15613.cpp: In function 'int solution::main()':
0_0_25624659_15613.cpp:440:36: error: 'pos' was not declared in this scope
     for (int i = 0; i < maxn; i++) pos[i] = i / unit;
                                    ^
0_0_25624659_15613.cpp: In lambda function:
0_0_25624659_15613.cpp:444:65: error: 'pos' was not declared in this scope
     sort(v, v + q, [&](const query& a, const query& b) { return pos[a.l] < pos[b.l] || pos[a.l] == pos[b.l] && a.r < b.r; });
                                                                 ^
In file included from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algobase.h:71:0,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/char_traits.h:39,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ios:40,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/istream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/sstream:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/complex:45,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/ccomplex:38,
                 from GCC4.9.2/x86_64-w64-mingw32/include/c++/x86_64-w64-mingw32/bits/stdc++.h:52,
                 from 0_0_25624659_15613.cpp:1:
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_iter<_Compare>::operator()(_Iterator1, _Iterator2) [with _Iterator1 = solution::query*; _Iterator2 = solution::query*; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1846:27:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1884:70:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1970:55:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4716:78:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = solution::query*; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]'
0_0_25624659_15613.cpp:444:124:   required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h:121:46: error: void value not ignored as it ought to be
         { return bool(_M_comp(*__it1, *__it2)); }
                                              ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Val_comp_iter<_Compare>::operator()(_Value&, _Iterator) [with _Value = solution::query; _Iterator = solution::query*; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1827:34:   required from 'void std::__unguarded_linear_insert(_RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Val_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1855:46:   required from 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1884:70:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1970:55:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4716:78:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = solution::query*; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]'
0_0_25624659_15613.cpp:444:124:   required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h:166:37: error: void value not ignored as it ought to be
  { return bool(_M_comp(__val, *__it)); }
                                     ^
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h: In instantiation of 'bool __gnu_cxx::__ops::_Iter_comp_val<_Compare>::operator()(_Iterator, _Value&) [with _Iterator = solution::query*; _Value = solution::query; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]':
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_heap.h:129:76:   required from 'void std::__push_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = solution::query*; _Distance = long long int; _Tp = solution::query; _Compare = __gnu_cxx::__ops::_Iter_comp_val<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_heap.h:230:51:   required from 'void std::__adjust_heap(_RandomAccessIterator, _Distance, _Distance, _Tp, _Compare) [with _RandomAccessIterator = solution::query*; _Distance = long long int; _Tp = solution::query; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_heap.h:334:15:   required from 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1673:49:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1932:59:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1947:59:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = solution::query*; _Size = long long int; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:1969:11:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = solution::query*; _Compare = __gnu_cxx::__ops::_Iter_comp_iter<solution::main()::<lambda(const solution::query&, const solution::query&)> >]'
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/stl_algo.h:4716:78:   required from 'void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = solution::query*; _Compare = solution::main()::<lambda(const solution::query&, const solution::query&)>]'
0_0_25624659_15613.cpp:444:124:   required from here
GCC4.9.2/x86_64-w64-mingw32/include/c++/bits/predefined_ops.h:141:37: error: void value not ignored as it ought to be
  { return bool(_M_comp(*__it, __val)); }
                                     ^


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