Submission #766930

#	Time	Username	Problem	Language	Result	Execution time	Memory
766930		turtlemode	Combo (IOI18_combo)	C++14	100 / 100	22 ms	520 KiB

combo

#include "combo.h"
#include <set>
#include <vector>
#include <iostream>
using namespace std;

std::string guess_sequence(int N) {
  if (N == 0){
    return "";
  }
  std::string S = "";
  if (press("AB")){
    if (press("A")){
      S += "A";
    }
    else{
      S += "B";
    }
  } else {
    if (press("X")){
      S += "X";
    }
    else{
      S += "Y";
    }
  }
  if (N == 1){
    return S;
  }
  set<string> all_chars {"A", "B", "X", "Y"};
  all_chars.erase(S);
  vector<string> legal_chars;
  set<string>::iterator k;
  for (k = all_chars.begin(); k != all_chars.end(); ++k)
    legal_chars.push_back(*k);

  //cout << "Current: " << S << endl;
  while (S.length() < N - 1){
    // int coins = press(S + "B" + S + "XB" + S + "XX" + S + "XY");
    int coins = press(S + legal_chars[0] + S + legal_chars[1] + legal_chars[0] + S + legal_chars[1] + legal_chars[1] + S + legal_chars[1] + legal_chars[2]);
    if (coins == S.length() + 1){
      S += legal_chars[0];
    }
    else if (coins == S.length() + 2){
      S += legal_chars[1];
    }
    else if (coins == S.length() + 0){
      S += legal_chars[2];
    }
    else {
      //cout << "Wuut" << endl;
    }
    //cout << "Current: " << S << endl;
  }


  if (press(S + legal_chars[0]) == S.length() + 1){
    return S + legal_chars[0];
  }
  if (press(S + legal_chars[1]) == S.length() + 1){
    return S + legal_chars[1];
  }
  else{
    return S + legal_chars[2];
  }
  //cout << "Wuuut2" << endl;
  return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:38:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |   while (S.length() < N - 1){
      |          ~~~~~~~~~~~^~~~~~~
combo.cpp:41:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     if (coins == S.length() + 1){
      |         ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:44:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     else if (coins == S.length() + 2){
      |              ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:47:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   47 |     else if (coins == S.length() + 0){
      |              ~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:57:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |   if (press(S + legal_chars[0]) == S.length() + 1){
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:60:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |   if (press(S + legal_chars[1]) == S.length() + 1){
      |       ~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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