#define PROBLEM "https://judge.yosupo.jp/problem/cartesian_tree" #include "../cartesian_tree.hpp" #include "../../util/template.hpp" int main(){ lint n; cin>>n; vec a(n); rep(i,n)cin>>a[i]; cartesian_tree<lint>ct(a); output(ct.get()); }
#line 1 "data_structure/test/LC_cartesian_tree.test.cpp" #define PROBLEM "https://judge.yosupo.jp/problem/cartesian_tree" #line 2 "data_structure/cartesian_tree.hpp" #include<vector> #include<stack> #include<cstdint> #include<functional> /** * @brief cartesian_tree */ template<typename T,typename F=std::less<T>> struct cartesian_tree{ struct node; using np=node*; struct node{ np ch[2]={0,0}; T val; int pos; int sz=0; node(T val,int pos):val(val),pos(pos){} }; int size(np t){return t?t->sz:0;} np update(np t){} np root=0; int sz=0; F comp; cartesian_tree(std::vector<T>v,F comp):comp(comp){ for(auto e:v)push_back(e); } cartesian_tree(std::vector<T>v):comp(F()){ for(auto e:v)push_back(e); } cartesian_tree(F comp):comp(comp){} cartesian_tree():comp(F()){} void push_back(int val){ static std::stack<np>stk; while(!stk.empty()&&comp(val,stk.top()->val))stk.pop(); np t=new node(val,sz); if(stk.empty()){ t->ch[0]=root; root=t; }else{ t->ch[0]=stk.top()->ch[1]; stk.top()->ch[1]=t; } stk.emplace(t); sz++; } std::int64_t update_size(np t){ if(!t)return 0; return t->sz=update_size(t->ch[0])+1+update_size(t->ch[1]); } std::vector<T>get(){ std::vector<T>v(sz); auto f=[&](auto f,np t){ if(!t)return; f(f,t->ch[0]); if(t->ch[0])v[t->ch[0]->pos]=t->pos; if(t->ch[1])v[t->ch[1]->pos]=t->pos; f(f,t->ch[1]); }; v[root->pos]=root->pos; f(f,root); return v; } }; #line 2 "util/template.hpp" #pragma GCC optimize("Ofast") #pragma GCC optimize("unroll-loops") #pragma GCC target("avx2") #include<bits/stdc++.h> using namespace std; struct __INIT__{__INIT__(){cin.tie(0);ios::sync_with_stdio(false);cout<<fixed<<setprecision(15);}}__INIT__; typedef long long lint; #define INF (1LL<<60) #define IINF (1<<30) #define EPS (1e-10) #define endl ('\n') typedef vector<lint> vec; typedef vector<vector<lint>> mat; typedef vector<vector<vector<lint>>> mat3; typedef vector<string> svec; typedef vector<vector<string>> smat; template<typename T>using V=vector<T>; template<typename T>using VV=V<V<T>>; template<typename T>inline void output(T t){bool f=0;for(auto i:t){cout<<(f?" ":"")<<i;f=1;}cout<<endl;} template<typename T>inline void output2(T t){for(auto i:t)output(i);} template<typename T>inline void debug(T t){bool f=0;for(auto i:t){cerr<<(f?" ":"")<<i;f=1;}cerr<<endl;} template<typename T>inline void debug2(T t){for(auto i:t)output(i);} #define loop(n) for(long long _=0;_<(long long)(n);++_) #define _overload4(_1,_2,_3,_4,name,...) name #define __rep(i,a) repi(i,0,a,1) #define _rep(i,a,b) repi(i,a,b,1) #define repi(i,a,b,c) for(long long i=(long long)(a);i<(long long)(b);i+=c) #define rep(...) _overload4(__VA_ARGS__,repi,_rep,__rep)(__VA_ARGS__) #define _overload3_rev(_1,_2,_3,name,...) name #define _rep_rev(i,a) repi_rev(i,0,a) #define repi_rev(i,a,b) for(long long i=(long long)(b)-1;i>=(long long)(a);--i) #define rrep(...) _overload3_rev(__VA_ARGS__,repi_rev,_rep_rev)(__VA_ARGS__) // #define rep(i,...) for(auto i:range(__VA_ARGS__)) // #define rrep(i,...) for(auto i:reversed(range(__VA_ARGS__))) // #define repi(i,a,b) for(lint i=lint(a);i<(lint)(b);++i) // #define rrepi(i,a,b) for(lint i=lint(b)-1;i>=lint(a);--i) // #define irep(i) for(lint i=0;;++i) // inline vector<long long> range(long long n){if(n<=0)return vector<long long>();vector<long long>v(n);iota(v.begin(),v.end(),0LL);return v;} // inline vector<long long> range(long long a,long long b){if(b<=a)return vector<long long>();vector<long long>v(b-a);iota(v.begin(),v.end(),a);return v;} // inline vector<long long> range(long long a,long long b,long long c){if((b-a+c-1)/c<=0)return vector<long long>();vector<long long>v((b-a+c-1)/c);for(int i=0;i<(int)v.size();++i)v[i]=i?v[i-1]+c:a;return v;} // template<typename T>inline T reversed(T v){reverse(v.begin(),v.end());return v;} #define all(n) begin(n),end(n) template<typename T,typename E>bool chmin(T& s,const E& t){bool res=s>t;s=min<T>(s,t);return res;} template<typename T,typename E>bool chmax(T& s,const E& t){bool res=s<t;s=max<T>(s,t);return res;} const vector<lint> dx={1,0,-1,0,1,1,-1,-1}; const vector<lint> dy={0,1,0,-1,1,-1,1,-1}; #define SUM(v) accumulate(all(v),0LL) template<typename T,typename ...Args>auto make_vector(T x,int arg,Args ...args){if constexpr(sizeof...(args)==0)return vector<T>(arg,x);else return vector(arg,make_vector<T>(x,args...));} #define extrep(v,...) for(auto v:__MAKE_MAT__({__VA_ARGS__})) #define bit(n,a) ((n>>a)&1) vector<vector<long long>> __MAKE_MAT__(vector<long long> v){if(v.empty())return vector<vector<long long>>(1,vector<long long>());long long n=v.back();v.pop_back();vector<vector<long long>> ret;vector<vector<long long>> tmp=__MAKE_MAT__(v);for(auto e:tmp)for(long long i=0;i<n;++i){ret.push_back(e);ret.back().push_back(i);}return ret;} using graph=vector<vector<int>>; template<typename T>using graph_w=vector<vector<pair<int,T>>>; template<typename T,typename E>ostream& operator<<(ostream& out,pair<T,E>v){out<<"("<<v.first<<","<<v.second<<")";return out;} constexpr inline long long powll(long long a,long long b){long long res=1;while(b--)res*=a;return res;} #line 4 "data_structure/test/LC_cartesian_tree.test.cpp" int main(){ lint n; cin>>n; vec a(n); rep(i,n)cin>>a[i]; cartesian_tree<lint>ct(a); output(ct.get()); }