제출 #298934

#제출 시각아이디문제언어결과실행 시간메모리
298934Hemimor마상시합 토너먼트 (IOI12_tournament)C++14
0 / 100
94 ms15328 KiB
#include <algorithm> #include <iostream> #include <iomanip> #include <numeric> #include <cassert> #include <vector> #include <cmath> #include <queue> #include <set> #include <map> #define syosu(x) fixed<<setprecision(x) using namespace std; typedef long long ll; typedef unsigned int uint; typedef unsigned long long ull; typedef pair<int,int> P; typedef pair<double,double> pdd; typedef pair<ll,ll> pll; typedef vector<int> vi; typedef vector<vi> vvi; typedef vector<double> vd; typedef vector<vd> vvd; typedef vector<ll> vl; typedef vector<vl> vvl; typedef vector<string> vs; typedef vector<P> vp; typedef vector<vp> vvp; typedef vector<pll> vpll; typedef pair<P,int> pip; typedef vector<pip> vip; const int inf=1<<30; const ll INF=1ll<<60; const double pi=acos(-1); const double eps=1e-8; const ll mod=1e9+7; const int dx[4]={-1,0,1,0},dy[4]={0,-1,0,1}; class Segment_Tree{ public: int n; vi date,ind; Segment_Tree(int n_){ n=1; while(n<n_) n*=2; date=vi(2*n-1); ind=vi(n); for(int i=0;i<n;i++){ Update(i,1); ind[i]=i; } } void Update(int k,int x){ k+=n-1; date[k]+=x; while(k>0){ k=(k-1)/2; date[k]=date[k*2+1]+date[k*2+2]; } } int Query(int x){ /* for(int i=0;i<n;i++) cout<<date[i+n-1]<<' '; cout<<endl;*/ int k=0; while(k<n-1){ if(date[2*k+1]<x) x-=date[2*k+1],k=2*k+2; else k=2*k+1; } return k-n+1; } int Open(int k){return date[k+n-1];} }; const int M=20; vvi g,par; vi lt,rt; int n; void dfs(int v){ if(v>=n) lt[v]=inf,rt[v]=-inf; for(auto u:g[v]){ dfs(u); // if(v==n+1) cout<<u<<' '<<lt[u]<<' '<<rt[u]<<endl; lt[v]=min(lt[v],lt[u]); rt[v]=max(rt[v],rt[u]); } } int GetBestPosition(int N,int C,int R,int *K,int *S,int *E){ n=N; g=vvi(N+C); lt=rt=vi(N+C); par=vvi(N+C,vi(M,-1)); Segment_Tree st(N); for(int i=0;i<C;i++){ int tmp=0; for(int j=0;j<E[i]-S[i]+1;j++){ int id=st.Query(S[i]+1); st.Update(id,-1); g[N+i].push_back(st.ind[id]); // cout<<N+i<<' '<<id<<' '<<st.ind[id]<<endl; par[st.ind[id]][0]=N+i; if(!j) tmp=id; } st.Update(tmp,1); st.ind[tmp]=N+i; } for(int i=0;i<N;i++) lt[i]=i,rt[i]=i+1; dfs(N+C-1); for(int i=1;i<M;i++) for(int j=0;j<N+C;j++){ int v=par[j][i-1]; if(v>=0) par[j][i]=par[v][i-1]; } int mx=0,id=0; int il=0,ir=1; auto f=[&](int v,int m){ // cout<<v<<' '; for(int i=0;i<M;i++) if(m&1<<i&&v>=0) v=par[v][i]; // cout<<v<<' '<<lt[v]<<' '<<rt[v]<<' '<<m<<endl; return v>=0&&il<=lt[v]&&rt[v]<=ir+1; }; // for(int i=0;i<N+C;i++) cout<<lt[i]<<','<<rt[i]<<endl; for(int i=0;i<N;i++){ while(ir<N-1&&K[ir]<R) ir++; if(i&&R<K[i-1]) il=i; int l=0,r=M+1; // cout<<'['<<il<<','<<ir<<']'<<endl; while(r-l>1){ int m=(l+r)/2; if(f(i,m)) l=m; else r=m; } // cout<<i<<' '<<l<<endl; if(mx<l) mx=l,id=i; } return id; } /* int main(){ int N,C,R,K[1000],S[1000],E[1000]; cin>>N>>C>>R; for(int i=0;i<N;i++) cin>>K[i]; for(int i=0;i<C;i++) cin>>S[i]>>E[i]; cout<<GetBestPosition(N,C,R,K,S,E)<<endl; }*/
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