제출 #559761

#제출 시각아이디문제언어결과실행 시간메모리
559761ngpin04크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
100 / 100
525 ms137720 KiB
#include <bits/stdc++.h> #define fi first #define se second #define mp make_pair #define TASK "" #define ALL(x) (x).begin(), (x).end() using namespace std; template <typename T1, typename T2> bool mini(T1 &a, T2 b) { if (a > b) {a = b; return true;} return false; } template <typename T1, typename T2> bool maxi(T1 &a, T2 b) { if (a < b) {a = b; return true;} return false; } const int N = 1e6 + 5; const int oo = 1e9; const long long ooo = 1e18; const int mod = 1e9 + 7; // 998244353; const long double pi = acos(-1); int ptr[N][26]; int anc[N][20]; int pos[N]; int d[N]; int cur,cnt,node; char a[N]; //#include "grader.cpp" void Init() {} void TypeLetter(char L) { int v = L - 'a'; if (!ptr[cur][v]) { ptr[cur][v] = ++node; a[node] = L; anc[node][0] = cur; for (int i = 1; i < 20; i++) anc[node][i] = anc[anc[node][i - 1]][i - 1]; d[node] = d[cur] + 1; } cur = ptr[cur][v]; pos[++cnt] = cur; } void UndoCommands(int U) { pos[cnt + 1] = pos[cnt - U]; cnt++; cur = pos[cnt]; } char GetLetter(int P) { int dis = d[cur] - (P + 1); int v = cur; for (int i = 0; i < 20; i++, dis >>= 1) if (dis & 1) v = anc[v][i]; return a[v]; }
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