제출 #538812

#제출 시각아이디문제언어결과실행 시간메모리
538812new_acc크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
100 / 100
629 ms65532 KiB
#include<bits/stdc++.h> #define fi first #define se second #define pitem item* using namespace std; typedef long long ll; typedef vector<int> vi; typedef vector<ll> vl; const int N=1e6+10; int zap[N],jump[N][21],dep[N]; char zn[N]; int l=1,num; void Init(){ zap[0]=1; for(int i=0;i<=20;i++) jump[1][i]=1; } void TypeLetter(char a){ jump[++l][0]=zap[num]; for(int i=1;i<=20;i++) jump[l][i]=jump[jump[l][i-1]][i-1]; dep[l]=dep[zap[num]]+1; zn[l]=a,zap[++num]=l; } void UndoCommands(int x){ num++; zap[num]=zap[num-x-1]; } char GetLetter(int p){ p++; int a=zap[num]; for(int i=20;i>=0;i--) if(dep[jump[a][i]]>=p) a=jump[a][i]; return zn[a]; }
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