제출 #911753

#제출 시각아이디문제언어결과실행 시간메모리
911753Faisal_Saqib크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++17
34 / 100
363 ms85884 KiB
#include <iostream> using namespace std; const int MAXT=2e6+100; const int LG=21; int tm=1; int par[MAXT][LG]; int len[MAXT]; char cp[MAXT]; void Init() { for(int j=0;j<1000;j++) cp[j]='$'; } void TypeLetter(char L) { cp[tm]=L; len[tm]=len[tm-1]+1; par[tm][0]=tm-1; for(int j=1;j<LG;j++) par[tm][j]=par[par[tm][j-1]][j-1]; tm++; } void UndoCommands(int U) { len[tm]=len[tm-U-1]; par[tm][0]=tm-U-1; for(int j=0;(j+1)<LG;j++) par[tm][j+1]=par[tm-U-1][j]; tm++; } char GetLetter(int P) { int ct=tm-1; for(int j=LG-1;j>=0;j--) { if(len[par[ct][j]]>P) { ct=par[ct][j]; } } return cp[ct]; }
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