제출 #123457

#제출 시각아이디문제언어결과실행 시간메모리
123457turbat크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
100 / 100
618 ms94456 KiB
#include <bits/stdc++.h> using namespace std; #define N 1000005 char last, s[N]; int t[N][21], now, d[N], f[N]; void Init() {} void TypeLetter(char L) { now++; s[now] = L; f[now] = now; d[now] = d[f[now - 1]] + 1; t[now][0] = f[now - 1]; for (int i = 1;i < 21;i++) t[now][i] = t[t[now][i - 1]][i - 1]; } void UndoCommands(int U) { now++; f[now] = f[now - U - 1]; } char GetLetter(int P) { int a = d[f[now]] - P - 1, cur = f[now]; for (int i = 0;i < 21;i++) if (a & 1<<i) cur = t[cur][i]; return s[cur]; }
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