Submission #918733

#TimeUsernameProblemLanguageResultExecution timeMemory
918733JakobZorzAbracadabra (CEOI22_abracadabra)C++17
10 / 100
3038 ms43584 KiB
#include<iostream> #include<vector> #include<queue> #include<stack> #include<algorithm> #include<limits.h> #include<math.h> #include<map> #include<set> #include<unordered_map> #include<unordered_set> #include<iomanip> #include<cstring> typedef long long ll; typedef unsigned long long ull; typedef long double ld; using namespace std; struct Query{ int t,i,ans,ord; }; void sort1(vector<Query>&vec){ vector<vector<Query>>cnt(200001); for(auto i:vec) cnt[i.t].push_back(i); vec.clear(); for(auto&i:cnt) for(auto&j:i) vec.push_back(j); } void sort2(vector<Query>&vec){ vector<Query>vec2(vec.size()); for(auto&i:vec) vec2[i.ord]=i; vec=vec2; } void solve(){ int n,q; cin>>n>>q; vector<int>init(n); vector<int>nxt(n); for(int&i:init) cin>>i; stack<pair<int,int>>st; st.push({n+1,n}); for(int i=n-1;i>=0;i--){ while(st.top().first<init[i]) st.pop(); nxt[i]=st.top().second; st.push({init[i],i}); } vector<Query>qrs(q); for(int i=0;i<q;i++) qrs[i].ord=i; for(auto&i:qrs){ cin>>i.t>>i.i; i.t=min(i.t,n); i.i--; } sort1(qrs); set<pair<int,pair<int,int>>>s; int sl=n; vector<int>end(n,-1); int end_end=n; for(int curr=0;curr<n;){ s.insert({init[curr],{curr,nxt[curr]}}); curr=nxt[curr]; } int cq=0; for(int round=0;round<=n;round++){ while(sl-((--s.end())->second.second-(--s.end())->second.first)>=n/2){ int last_len=(--s.end())->second.second-(--s.end())->second.first; sl-=last_len; end_end-=last_len; for(int i=0;i<last_len;i++) end[end_end+i]=init[(--s.end())->second.first+i]; s.erase(--s.end()); } if(cq<q&&qrs[cq].t==round){ vector<int>vec=end; int ci=0; for(auto i:s){ for(int j=i.second.first;j<i.second.second;j++){ vec[ci++]=init[j]; } } while(cq<q&&qrs[cq].t==round){ qrs[cq].ans=vec[qrs[cq].i]; cq++; } } if(sl==n/2) continue; auto curr=(--s.end())->second; s.erase(--s.end()); sl-=curr.second-curr.first; auto nw=curr; nw.second=nw.first+n/2-sl; s.insert({init[nw.first],nw}); sl+=nw.second-nw.first; curr.first=nw.second; int prev=curr.first; for(int i=curr.first+1;i<curr.second;i++){ if(init[i]>init[prev]){ s.insert({init[prev],{prev,i}}); sl+=i-prev; prev=i; } } s.insert({init[prev],{prev,curr.second}}); sl+=curr.second-prev; } sort2(qrs); for(auto&i:qrs){ cout<<i.ans<<"\n"; } } int main(){ ios::sync_with_stdio(false);cout.tie(NULL);cin.tie(NULL); //freopen("input.in","r",stdin);freopen("output.out","w",stdout); int t=1;//cin>>t; while(t--)solve(); return 0; } /* 6 3 1 5 6 2 3 4 1 2 0 4 1 5 2 2 5 6 6 2 1 5 4 6 3 0 1 1 1 0 3 1 3 0 6 10 6 2 2 5 4 3 3 10 10 7 5 2 9 10 8 4 3 6 1 3 1 3 2 3 3 3 4 3 5 3 6 3 7 3 8 3 9 3 10 2 3 6 1 7 5 8 4 9 10 */
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