Submission #1016357

#	Time	Username	Problem	Language	Result	Execution time	Memory
1016357		Faggi	Crayfish scrivener (IOI12_scrivener)	C++11	5 / 100	5 ms	3164 KiB

scrivener

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

// Stores the current text and history of commands
vector<char> text;
stack<pair<int, vector<char>>> history;

void Init() {
  // Initialize empty text and history
  text.clear();
  history.push({0, vector<char>()});
}

void TypeLetter(char L) {
  // Append letter to text and update history
  text.push_back(L);
  history.push({history.top().first + 1, vector<char>()});
}

void UndoCommands(int U) {
  // Undo U commands in reverse order
  for (int i = 0; i < U; i++) {
    int prevSize = history.top().first;
    vector<char> undo = history.top().second;

    // If TypeLetter was undone, remove the letter and previous commands
    if (undo.empty()) {
      text.resize(prevSize);
    } else {
      // Redo previously undone commands (UndoCommands)
      for (char c : undo) {
        text.push_back(c);
      }
    }
    history.pop();
  }
}

char GetLetter(int P) {
  // Return letter at position P based on current state
  return text[P];
}

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