Submission #889253

#	Time	Username	Problem	Language	Result	Execution time	Memory
889253		Hugo1729	Combo (IOI18_combo)	C++11	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>

using namespace std;

// int press(string q){return 1;}

string guess_sequence(int N){
  string ans;
  string letters[3];
  if (press("A")==1) {ans="A";letters[0]="B";letters[1]="X";letters[2]="Y";}
  if (press("B")==1) {ans="B";letters[0]="A";letters[1]="X";letters[2]="Y";}
  if (press("X")==1) {ans="X";letters[0]="B";letters[1]="A";letters[2]="Y";}
  if (press("Y")==1) {ans="Y";letters[0]="B";letters[1]="X";letters[2]="A";}
  
  while(ans.length()<N-2){
    int n=ans.length();

    int query = press(ans+letters[0]+ans+letters[1]+letters[0]+ans+letters[1]+letters[1]+ans+letters[1]+letters[2]);

    if (query==n+1) ans+=letters[0];
    if (query==n+2) ans+=letters[1];
    if (query==n) ans+=letters[2];
  }

  if (press(ans+letters[0])==ans.length()+1) ans+=letters[0];
  if (press(ans+letters[1])==ans.length()+1) ans+=letters[1];
  if (press(ans+letters[2])==ans.length()+1) ans+=letters[2];

  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:7: error: 'press' was not declared in this scope
   10 |   if (press("A")==1) {ans="A";letters[0]="B";letters[1]="X";letters[2]="Y";}
      |       ^~~~~
combo.cpp:11:7: error: 'press' was not declared in this scope
   11 |   if (press("B")==1) {ans="B";letters[0]="A";letters[1]="X";letters[2]="Y";}
      |       ^~~~~
combo.cpp:12:7: error: 'press' was not declared in this scope
   12 |   if (press("X")==1) {ans="X";letters[0]="B";letters[1]="A";letters[2]="Y";}
      |       ^~~~~
combo.cpp:13:7: error: 'press' was not declared in this scope
   13 |   if (press("Y")==1) {ans="Y";letters[0]="B";letters[1]="X";letters[2]="A";}
      |       ^~~~~
combo.cpp:15:21: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   15 |   while(ans.length()<N-2){
      |         ~~~~~~~~~~~~^~~~
combo.cpp:18:17: error: 'press' was not declared in this scope
   18 |     int query = press(ans+letters[0]+ans+letters[1]+letters[0]+ans+letters[1]+letters[1]+ans+letters[1]+letters[2]);
      |                 ^~~~~
combo.cpp:25:7: error: 'press' was not declared in this scope
   25 |   if (press(ans+letters[0])==ans.length()+1) ans+=letters[0];
      |       ^~~~~
combo.cpp:26:7: error: 'press' was not declared in this scope
   26 |   if (press(ans+letters[1])==ans.length()+1) ans+=letters[1];
      |       ^~~~~
combo.cpp:27:7: error: 'press' was not declared in this scope
   27 |   if (press(ans+letters[2])==ans.length()+1) ans+=letters[2];
      |       ^~~~~