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View Compilation Error

0_0_29898918_26167.cpp: In function 'int chk0(int, int, int)':
0_0_29898918_26167.cpp:54:23: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'x'
  if (g[0][len].back().x == L) {
                       ^
0_0_29898918_26167.cpp:60:24: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'y'
   if (g[0][len].back().y<lst) {
                        ^
0_0_29898918_26167.cpp:69:23: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'y'
  if (g[0][len].back().y<lst) return 1;
                       ^
0_0_29898918_26167.cpp: In function 'int chk1(int, int, int)':
0_0_29898918_26167.cpp:75:23: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'x'
  if (g[1][len].back().x == L) {
                       ^
0_0_29898918_26167.cpp:81:24: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'y'
   if (g[1][len].back().y>lst) {
                        ^
0_0_29898918_26167.cpp:90:23: error: '__gnu_cxx::__alloc_traits<std::allocator<std::pair<int, int> > >::value_type' has no member named 'y'
  if (g[1][len].back().y>lst) return 1;
                       ^


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