제출 #1045256

#제출 시각아이디문제언어결과실행 시간메모리
1045256codexistent크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
100 / 100
159 ms84052 KiB
#include <bits/stdc++.h> using namespace std; #define MAXN 1000005 #define LOGN 25 #define FOR(i, a, b) for(int i = a; i <= b; i++) char l[MAXN]; int ln, qn; int sz[MAXN], lj[MAXN][LOGN], dp[MAXN]; void Init() { qn = 0; sz[0] = 0; l[0] = 'X', ln = 0; dp[0] = 0; } void TypeLetter(char L) { qn++, ln++; sz[ln] = sz[dp[qn - 1]] + 1, l[ln] = L; dp[qn] = ln; lj[ln][0] = dp[qn - 1]; for(int ji = 1, jsz = 2; jsz <= sz[ln] - 1; ji++, jsz *= 2){ lj[ln][ji] = lj[lj[ln][ji - 1]][ji - 1]; } } void UndoCommands(int U) { qn++; dp[qn] = dp[qn - U - 1]; } char GetLetter(int P) { int szi = sz[dp[qn]]; int rmj = szi - P - 1; int r = dp[qn]; FOR(i, 0, 20){ if((1 << i) & rmj){ r = lj[r][i]; } } return l[r]; }
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