38 lines
1.3 KiB
C++
38 lines
1.3 KiB
C++
#include <bits/stdc++.h>
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#include <ext/rope>
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#include <ext/pb_ds/assoc_container.hpp>
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#include <ext/pb_ds/tree_policy.hpp>
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using namespace __gnu_pbds;
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using namespace __gnu_cxx;
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template<typename T>
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using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
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indexed_set<int> s;
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s.insert(3); s.insert(2); s.insert(3); s.insert(9); s.insert(7); //2 3 7 9
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s.insert(5); //2 3 5 7 9
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s.erase(5); //2 3 7 9
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auto x = s.find_by_order(2); // *x : 7
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s.order_of_key(6) // 2
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s.order_of_key(7) // 2
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s.order_of_key(8) // 3
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/////////////////////////////////////////////////////////////
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// greater_equal <- ordered_multiset / greater <- ordered_multiset
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#define oset_greater tree<ll, null_type, greater_equal<ll>, rb_tree_tag, tree_order_statistics_node_update>
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#define oset_less tree<ll, null_type, less_equal<ll>, rb_tree_tag, tree_order_statistics_node_update>
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void oset_m_erase(ordered_set_greater &OS, ll val){
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int index = OS.order_of_key(val);
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oset_greater::iterator it = OS.find_by_order(index);
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if(it != OS.end() && *it == val) OS.erase(it);
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}
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/////////////////////////////////////////////////////////////
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rope<ll> r;
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r.insert(r.size() - t, i); //r.size()-t번째 자리에 i를 삽입
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r.substr(a, b - a + 1) // a부터 (b-a+1)개 만큼을 잘라낸다. 즉, [a, b] 선택
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