Submission #232215

#	Time	Username	Problem	Language	Result	Execution time	Memory
232215		jam_xd_	Combo (IOI18_combo)	C++17	30 / 100	61 ms	564 KiB

combo

#include "combo.h"

std::string guess_sequence(int N) {
  std::string L = "ABXY";
  std::string s = "";

  if(press("AB") > 0) {
 if(press("A") > 0){
   s = "A";
   L = "BXY";
 } else {
   s = "B";
   L = "AXY";
    }
  } else if(press("XY") > 0) {
 if(press("X") > 0){
   s = "X";
   L = "ABY";
 } else {
   s = "Y";
   L = "ABX";
    }
  }

  while(s.length() < N){
 if(press(s+L[0]+s+L[1]) > s.length()) {
   if(press(s+L[0]) > s.length()) s += L[0];
   else s += L[1];
 } else {
   s += L[2];
 }
  }

  return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:25:20: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |   while(s.length() < N){
      |         ~~~~~~~~~~~^~~
combo.cpp:26:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |  if(press(s+L[0]+s+L[1]) > s.length()) {
      |     ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:27:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |    if(press(s+L[0]) > s.length()) s += L[0];
      |       ~~~~~~~~~~~~~~^~~~~~~~~~~~

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