Submission #477028

#	Time	Username	Problem	Language	Result	Execution time	Memory
477028		glome	Combo (IOI18_combo)	C++17	10 / 100	83 ms	536 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

std::string guess_sequence(int N) {
  set<int> s;
  s.insert('A');
  s.insert('B');
  s.insert('X');
  string S;
  for (int i = 0; i<N; i++) {
    if(i == 0) {
      bool ok = 0;
      for (char c : s) {
        if(press(string(1, c))) {
          S.push_back(c);
          s.erase(c);
          ok = 1;
          break;
        }
      }
      if(!ok) {
        S.push_back('Y');
      }
      continue;
    }
    bool ok = 0;
    for (char c : s) {
      if(press(S + c) == S.size() + 1) {
        S.push_back(c);
        ok = 1;
        break;
      }
    }
    if(!ok) {
      S.push_back('Y');
    }
  }
  return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |       if(press(S + c) == S.size() + 1) {
      |          ~~~~~~~~~~~~~^~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 95