Eroare de compilare: main.cpp:8:19: error: 'null_type' was not declared in this scope 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~ main.cpp:8:19: note: suggested alternatives: In file included from /usr/include/c++/12.2.1/ext/pb_ds/assoc_container.hpp:46, from main.cpp:2: /usr/include/c++/12.2.1/ext/pb_ds/tag_and_trait.hpp:210:10: note: '__gnu_pbds::null_type' 210 | struct null_type { }; | ^~~~~~~~~ In file included from /usr/include/c++/12.2.1/ext/pb_ds/assoc_container.hpp:45: /usr/include/c++/12.2.1/ext/typelist.h:57:10: note: '__gnu_cxx::typelist::null_type' 57 | struct null_type { }; | ^~~~~~~~~ main.cpp:8:41: error: 'rb_tree_tag' was not declared in this scope; did you mean '__gnu_pbds::rb_tree_tag'? 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~~~ | __gnu_pbds::rb_tree_tag /usr/include/c++/12.2.1/ext/pb_ds/tag_and_trait.hpp:153:10: note: '__gnu_pbds::rb_tree_tag' declared here 153 | struct rb_tree_tag : public tree_tag { }; | ^~~~~~~~~~~ main.cpp:8:54: error: 'tree_order_statistics_node_update' was not declared in this scope; did you mean '__gnu_pbds::tree_order_statistics_node_update'? 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | __gnu_pbds::tree_order_statistics_node_update In file included from /usr/include/c++/12.2.1/ext/pb_ds/detail/standard_policies.hpp:48, from /usr/include/c++/12.2.1/ext/pb_ds/assoc_container.hpp:47: /usr/include/c++/12.2.1/ext/pb_ds/tree_policy.hpp:64:9: note: '__gnu_pbds::tree_order_statistics_node_update' declared here 64 | class tree_order_statistics_node_update : private PB_DS_BRANCH_POLICY_BASE | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:8:19: error: 'null_type' was not declared in this scope 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~ main.cpp:8:19: note: suggested alternatives: /usr/include/c++/12.2.1/ext/pb_ds/tag_and_trait.hpp:210:10: note: '__gnu_pbds::null_type' 210 | struct null_type { }; | ^~~~~~~~~ /usr/include/c++/12.2.1/ext/typelist.h:57:10: note: '__gnu_cxx::typelist::null_type' 57 | struct null_type { }; | ^~~~~~~~~ main.cpp:8:41: error: 'rb_tree_tag' was not declared in this scope; did you mean '__gnu_pbds::rb_tree_tag'? 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~~~ | __gnu_pbds::rb_tree_tag /usr/include/c++/12.2.1/ext/pb_ds/tag_and_trait.hpp:153:10: note: '__gnu_pbds::rb_tree_tag' declared here 153 | struct rb_tree_tag : public tree_tag { }; | ^~~~~~~~~~~ main.cpp:8:54: error: 'tree_order_statistics_node_update' was not declared in this scope; did you mean '__gnu_pbds::tree_order_statistics_node_update'? 8 | typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> indexed_set; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | __gnu_pbds::tree_order_statistics_node_update Non zero exit status: 1