Submission #1034715

#	Time	Username	Problem	Language	Result	Execution time	Memory
1034715		DeathIsAwe	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
using namespace std;

string guess_sequence(int n) {
  vector<char> letters;
  string p = "";
  string ptemp = "";
  int temp = press("AB");
  if (temp == 2) {
    p += 'A';
  } else if (temp == 1) {
    temp = press("A");
    if (temp == 1) {
      p += 'A';
    } else {
      p += 'B';
    }
  } else {
    temp = press("X");
    if (temp == 1) {
      p += 'X';
    } else {
      p += 'Y';
    }
  }
  if ('A' != p[0]) {
    letters.push_back('A');
  }
  if ('B' != p[0]) {
    letters.push_back('B');
  }
  if ('X' !=p[0]) {
    letters.push_back('X');
  }
  if ('Y' !=p[0]) {
    letters.push_back('Y');
  }



  int count;
  while (p.size() < n-1) {
    ptemp = "";
    count = 0;
    for (int i=0;i<3;i++) {
      ptemp += p;
      ptemp += letters[0];
      ptemp += letters[i];
    }
    ptemp += p;
    ptemp += letters[1];
    
    temp=press(ptemp);
    if (temp == p.size()) {
      p+=letters[2];
    } else  if (temp == p.size()+1) {
      p += letters[1];
    } else {
      p += letters[0];
    }
  }

  ptemp = p + letters[0];
  if (press(ptemp) == n) {
    p += letters[0];
    return p;
  } else {
    ptemp = p + letters[1];
    if (press(ptemp) == n) {
      p += letters[1];
      return p;
    } else {
      p += letters[2];
      return p;
    }
  }
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:14: error: 'press' was not declared in this scope
    8 |   int temp = press("AB");
      |              ^~~~~
combo.cpp:42:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |   while (p.size() < n-1) {
      |          ~~~~~~~~~^~~~~
combo.cpp:54:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |     if (temp == p.size()) {
      |         ~~~~~^~~~~~~~~~~
combo.cpp:56:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 |     } else  if (temp == p.size()+1) {
      |                 ~~~~~^~~~~~~~~~~~~
combo.cpp:5:16: warning: control reaches end of non-void function [-Wreturn-type]
    5 |   vector<char> letters;
      |                ^~~~~~~