제출 #566824

#제출 시각아이디문제언어결과실행 시간메모리
566824zaneyu즐거운 행로 (APIO20_fun)C++14
100 / 100
260 ms22612 KiB
#include "fun.h" #include <bits/stdc++.h> #define pb push_back #define sz(x) (int)x.size() #define REP1(i,n) for(int i=1;i<=n;i++) #define pii pair<int,int> #define s second #define MNTO(x,y) x=min(x,y) #define ALL(x) x.begin(),x.end() using namespace std; const int maxn=1e5+5; #define REP(i,n) for(int i=0;i<n;i++) int d[maxn],p[maxn]; vector<int> t[maxn]; bool cmp(int a,int b){ return d[a]<d[b]; } bool cmp2(int a,int b){ return sz(t[a])>sz(t[b]); } bool cmp3(int a,int b){ return d[t[a].back()]>d[t[b].back()]; } vector<int> createFunTour(int n, int q) { pii mn={INT_MAX,-1}; REP(i,n){ int sz=attractionsBehind(0,i); if(sz>n/2) MNTO(mn,make_pair(sz,i)); } int c=mn.s; vector<int> v; REP(i,n){ d[i]=hoursRequired(c,i); if(d[i]==1) v.pb(i); } REP(i,n){ if(i==c) continue; while(p[i]<sz(v)-1 and hoursRequired(v[p[i]],i)>d[i]) ++p[i]; t[p[i]].pb(i); } int ord[3]={0,1,2}; REP(i,3) sort(ALL(t[i]),cmp); sort(ord,ord+3,cmp2); vector<int> ans; int pv=-1; while(sz(t[ord[0]])<sz(t[ord[1]])+sz(t[ord[2]])){ sort(ord,ord+3,cmp3); int i=(pv==ord[0]); ans.pb(t[ord[i]].back()); t[ord[i]].pop_back(); pv=ord[i]; sort(ord,ord+3,cmp2); } t[ord[1]].insert(t[ord[1]].end(),ALL(t[ord[2]])); sort(ALL(t[ord[1]]),cmp); int st=0; if(sz(ans) and d[ans.back()]<d[t[ord[1]].back()]) st=1; while(sz(t[ord[st]])){ ans.pb(t[ord[st]].back()); t[ord[st]].pop_back(); st=1-st; } ans.pb(c); return ans; }
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