Submission #1038523

#	Time	Username	Problem	Language	Result	Execution time	Memory
1038523		vjudge1	Combo (IOI18_combo)	C++17	5 / 100	1 ms	380 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
std::string guess_sequence(int N) {
  string str,buton;
  if(press("AB"))
    if(press("A"))
      str="A",buton="BXY";
    else str="B",buton="AXY";
  else if(press("X"))
      str="X",buton="ABY";
    else str="Y",buton="ABX";
  for(int i=2;i<N;i++){
    int k=press(str+buton[0]+str+buton[1]+buton[0]+str+buton[1]+buton[1]+str+buton[1]+buton[2]);
    if(k==str.size())str+=buton[2];
    else if(k<str.size()+2)
      str+=buton[0];
    else str+=buton[1];
  };
  if(press(str+buton[0])==N)
    str+=buton[0];
  else if(press(str+buton[1])==N)
    str+=buton[1];
  else str+=buton[2],assert(press(str)==N);
  return str;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:15:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   15 |     if(k==str.size())str+=buton[2];
      |        ~^~~~~~~~~~~~
combo.cpp:16:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     else if(k<str.size()+2)
      |             ~^~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95