제출 #1041378

#제출 시각아이디문제언어결과실행 시간메모리
1041378ArthuroWich크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++17
100 / 100
190 ms142364 KiB
#include<bits/stdc++.h> using namespace std; int st = 0, co = 1, a[1000005], depth[1000005], ch[1000005], trie[1000005][26], succ[1000005][20]; void Init() {}; void initsucc(int i) { for (int j = 1; j < 20; j++) { succ[i][j] = succ[succ[i][j-1]][j-1]; } } int kthjump(int a, int k) { for (int i = 0; i < 20; i++) { if (k & (1 << i)) { a = succ[a][i]; } } return a; } void TypeLetter(char l) { int n = a[st], c = l-'a'; st++; if (!trie[n][c]) { succ[co][0] = n; depth[co] = depth[n]+1; trie[n][c] = co; ch[co] = c; initsucc(co); co++; } a[st] = trie[n][c]; } void UndoCommands(int U) { st++; a[st] = a[st-1-U]; } char GetLetter(int P) { int n = a[st]; int a = kthjump(n, depth[n]-1-P); return (char)(ch[a]+'a'); }
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