제출 #590072

#제출 시각아이디문제언어결과실행 시간메모리
590072eNGy크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++17
0 / 100
269 ms105312 KiB
#include <bits/stdc++.h> #define pb push_back using namespace std; vector<int> V, D; vector<char> C; vector<vector<int>> Log; int last = 0; void Init(){ V.pb(-1); D.pb(-1); C.pb('$'); Log.pb(vector<int>(25, 0)); } void prepross(){ Log.pb(vector<int>(25, 0)); int i=0; while(Log[last][i] != 0){ Log[last][i+1] = Log[Log[last][i]][i]; i++; } } void TypeLetter(char L){ C.pb(L), V.pb(last); D.pb(D[last]+1); last++; prepross(); } void UndoCommands(int U){ C.pb(C[last-U]); V.pb(V[last-U]); D.pb(D[last-U]); Log.pb(Log[last-U]); last++; } char GetLetter(int P){ int n = last; P = D[n] - P; for(int p=1, e=0; P>0; p *= 2, e++){ n = Log[n][e]; P -= p; } return C[n]; }
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