제출 #121250

#제출 시각아이디문제언어결과실행 시간메모리
121250baluteshihCrayfish scrivener (IOI12_scrivener)C++14
60 / 100
1081 ms119288 KiB
#include <bits/stdc++.h> #define jizz ios::sync_with_stdio(0),cin.tie(0),cout.tie(0); #define pb push_back #define ET cout << "\n" #define MEM(i,j) memset(i,j,sizeof i) #define F first #define S second #define MP make_pair #define ALL(v) v.begin(),v.end() #define DB(a,s,e) {for(int i=s;i<e;++i) cout << a[i] << " ";ET;} using namespace std; typedef long long ll; typedef pair<int,int> pii; typedef pair<ll,ll> pll; vector<vector<pair<int,char>>> v(1000005,vector<pair<int,char>>()); int Len[1000005],pa[20][1000005],ti[1000005],lg=19,t; void Init(){ t=0,Len[0]=-1; } int finds(int x) { if(ti[x]==x) return x; return ti[x]=finds(ti[x]); } void TypeLetter(char L) { ++t,ti[t]=t,Len[t]=Len[finds(t-1)]+1,v[Len[t]].pb(MP(t,L)); pa[0][t]=finds(t-1); for(int i=1;i<=lg;++i) pa[i][t]=pa[i-1][pa[i-1][t]]; } void UndoCommands(int U) { ++t,ti[t]=finds(t-U-1),Len[t]=Len[finds(t-U-1)]; } char GetLetter(int P) { int x=finds(t); for(int i=__lg(t);i>=0;--i) if(Len[pa[i][x]]>=P) x=pa[i][x]; if(Len[pa[0][x]]>=P) x=pa[0][x]; auto p=lower_bound(ALL(v[P]),MP(x,'a')); return p->S; }
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