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View Compilation Error

0_0_38104190_28119.cpp: In function 'void ODT::change(int, int)':
0_0_38104190_28119.cpp:211:10: error: expected unqualified-id before '[' token
     auto [l, r, attr] = *it;
          ^
0_0_38104190_28119.cpp:212:22: error: 'attr' was not declared in this scope
     ll diff = weight[attr] - weight[val];
                      ^
0_0_38104190_28119.cpp:213:12: error: 'l' was not declared in this scope
     modify(l, r, diff);
            ^
0_0_38104190_28119.cpp:213:15: error: 'r' was not declared in this scope
     modify(l, r, diff);
               ^
0_0_38104190_28119.cpp: In function 'void ODT::assign(int, int, int)':
0_0_38104190_28119.cpp:248:14: error: expected unqualified-id before '[' token
         auto [_l, _r, attr] = *it;
              ^
0_0_38104190_28119.cpp:249:26: error: 'attr' was not declared in this scope
         ll diff = weight[attr] - weight[val];
                          ^
0_0_38104190_28119.cpp:250:16: error: '_l' was not declared in this scope
         modify(_l, _r, diff);
                ^
0_0_38104190_28119.cpp:250:20: error: '_r' was not declared in this scope
         modify(_l, _r, diff);
                    ^


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