Submission #918786

#TimeUsernameProblemLanguageResultExecution timeMemory
918786JakobZorzAbracadabra (CEOI22_abracadabra)C++17
10 / 100
3053 ms24372 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; int n; int l[200001]; int r[200001]; vector<int>init; void insert(int a,int b){ l[init[a]]=a; r[init[a]]=b; } pair<int,int>get(int sum){ for(int i=0;i<=n;i++){ sum-=r[i]-l[i]; if(sum<0) return{i,sum+r[i]-l[i]}; } abort(); } void solve(){ int q; cin>>n>>q; init.resize(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<vector<pair<int,int>>>qrs(n+1); vector<int>ans(q,-1); for(int i=0;i<q;i++){ int t,qi; cin>>t>>qi; t=min(t,n); qrs[t].push_back({qi-1,i}); } for(int curr=0;curr<n;){ insert(curr,nxt[curr]); curr=nxt[curr]; } for(int round=0;round<=n;round++){ for(auto i:qrs[round]){ auto res=get(i.first); ans[i.second]=init[l[res.first]+res.second]; } auto res=get(n/2); if(res.second==0) continue; int nl=l[res.first]+res.second; int nr=r[res.first]; insert(l[res.first],nl); for(int curr=nl;curr<nr;){ int nx=min(nxt[curr],nr); insert(curr,nx); curr=nx; } } for(int i:ans){ if(i==-1) abort(); cout<<i<<"\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 6 1 4 2 3 5 6 0 1 0 2 0 3 0 4 0 5 0 6 1 4 2 3 5 6 4 4 4 3 2 1 0 1 0 2 0 3 0 4 4 3 2 1 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 6 6 4 5 6 1 2 3 10 1 10 2 10 3 10 4 10 5 10 6 1 2 3 4 5 6 10 10 5 4 3 10 9 8 7 6 2 1 4 1 4 2 4 3 4 4 4 5 4 6 4 7 4 8 4 9 4 10 1 2 5 4 3 6 8 7 10 9 */
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