Submission #588915

#	Time	Username	Problem	Language	Result	Execution time	Memory
588915		ollpu	Combo (IOI18_combo)	C++17	30 / 100	59 ms	472 KiB

combo

#include "combo.h"
using namespace std;

std::string guess_sequence(int N) {
  string S;
  for (int i = 0; i < N; ++i) {
    string p = S;
    p.push_back('A');
    p.insert(p.end(), S.begin(), S.end());
    p.push_back('B');
    if (press(p) > S.size()) {
      p = S;
      p.push_back('A');
      if (press(p) > S.size()) S.push_back('A');
      else S.push_back('B');
    } else {
      p = S;
      p.push_back('X');
      if (press(p) > S.size()) S.push_back('X');
      else S.push_back('Y');
    }
  }
  return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     if (press(p) > S.size()) {
      |         ~~~~~~~~~^~~~~~~~~~
combo.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |       if (press(p) > S.size()) S.push_back('A');
      |           ~~~~~~~~~^~~~~~~~~~
combo.cpp:19:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |       if (press(p) > S.size()) S.push_back('X');
      |           ~~~~~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 25 / 95