Submission #1243270

#	Time	Username	Problem	Language	Result	Execution time	Memory
1243270		kunzaZa183	크레이피쉬 글쓰는 기계 (IOI12_scrivener)	C++20	0 / 100	113 ms	16864 KiB

scrivener

#include <bits/stdc++.h>
using namespace std;

string sth;
int cur = 0;
vector<int> rev;
const int logn = 4;
vector<vector<int>> binj(logn);
vector<int> dep;

int ct = 0;
void Init() {
  assert(ct == 0);
  sth.push_back(' ');
  rev.push_back(-1);
  dep.push_back(0);
  for (int i = 0; i < logn; i++) {
    binj[i].push_back(0);
  }
  ct++;
}

void TypeLetter(char L) {
  rev.push_back(cur);
  dep.push_back(dep[cur] + 1);
  sth.push_back(L);
  binj[0].push_back(cur);
  cur = binj[0].size() - 1;

  for (int i = 1; i < logn; i++)
    binj[i].push_back(binj[i - 1][binj[i - 1][cur]]);
}

void UndoCommands(int U) {
  rev.push_back(cur);

  cur = rev[rev.size() - U - 1];
}

char GetLetter(int P) {
  int jumps = dep[cur] - P - 1;

  int tmp = cur;
  for (int i = 0; i < logn; i++) {
    if ((1 << i) & jumps) {
      tmp = binj[i][tmp];
    }
  }

  return sth[tmp];
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40