제출 #18494

#제출 시각아이디문제언어결과실행 시간메모리
18494eaststar크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
100 / 100
774 ms87988 KiB
char c[1000010]; int a[1000010],lev[1000010],st[20][1000010],t; void Init(){} void TypeLetter(char L){ int i; c[a[++t]=t]=L; lev[t]=lev[st[0][t]=a[t-1]]+1; for(i=1;i<20;++i)st[i][t]=st[i-1][st[i-1][t]]; } void UndoCommands(int U){a[++t]=a[t-U-1];} char GetLetter(int P){ int i,x=a[t]; for(i=20;i--;)if(lev[st[i][x]]>P)x=st[i][x]; return c[x]; }
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