제출 #169307

#제출 시각아이디문제언어결과실행 시간메모리
169307AlexLuchianov크레이피쉬 글쓰는 기계 (IOI12_scrivener)C++14
60 / 100
1088 ms83192 KiB
#include <iostream> int const nmax = 1000000; using ll = long long; #define MIN(a, b) (((a) < (b)) ? (a) : (b)) #define MAX(a, b) (((a) < (b)) ? (b) : (a)) char last; int far[20][1 + nmax], ptr = 0; int level[1 + nmax]; char chr[1 + nmax]; void Init() {} void TypeLetter(char L) { ++ptr; far[0][ptr] = ptr - 1; for(int h = 1; h < 20; h++) far[h][ptr] = far[h - 1][far[h - 1][ptr]]; level[ptr] = level[far[0][ptr]] + 1; chr[ptr] = L; } void UndoCommands(int U) { ++ptr; far[0][ptr] = ptr - 1 - U; for(int h = 1; h < 20; h++) far[h][ptr] = far[h - 1][far[h - 1][ptr]]; level[ptr] = level[far[0][ptr]]; } char GetLetter(int P) { int pos = ptr; P++; for(int h = 19; 0 <= h; h--) if(P <= level[far[h][pos]] ) pos = far[h][pos]; return chr[pos]; }
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