Submission #1239357

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239357		caacrugon	Crayfish scrivener (IOI12_scrivener)	C++20	34 / 100	148 ms	327680 KiB

scrivener

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

#define mkp make_pair

vector<string> history;

void Init() {
  history.clear();
  history.push_back("");
}

void TypeLetter(char L) {
  history.push_back(history.back()+L);
}

void UndoCommands(int U) {
  int target=history.size()-1-U;
  history.push_back(history[target]);
}

char GetLetter(int P) {
  string s=history.back();
  return s[P];
}

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