Submission #870920

#	Time	Username	Problem	Language	Result	Execution time	Memory
870920		_unknown_2010	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include<bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
  //string p = "";
  char ot[3];
  string ans;
  if(press("A")==1)
    ans="A",ot[0]='B',ot[1]='X',ot[2]='Y';
  else if(press("B")==1)
    ans="B",ot[0]='A',ot[1]='X',ot[2]='Y';
  else if(press("X")==1)
    ans="X",ot[0]='B',ot[1]='A',ot[2]='Y';
    else
    ans="Y",ot[0]='B',ot[1]='X',ot[2]='A';
  //int coins = press(p);
  string S;
 // cout<<N<<'\n';
  if(N==1) return ans;
  for (int i = 2; i <N; ++i) {
    S   = ans+ot[0]+ans+ot[1]+ot[0]+ans+ot[1]+ot[1]+ans+ot[1]+ot[2];
    //cout<<S<<' ';
   // cout<<S.size()<<'\n';
    int p=press(S);
    if(p==i-1) ans+=ot[2];
    else if(p==i) ans+=ot[0];
    else ans+=ot[1];
    //cout<<ans<<'\n';
  }
if(press(ans+ot[0])==N) ans+=ot[0];
else if( press(ans+ot[1])==N) ans+=ot[1];
else ans+=ot[2];
 
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:7:6: error: 'press' was not declared in this scope
    7 |   if(press("A")==1)
      |      ^~~~~
combo.cpp:23:11: error: 'press' was not declared in this scope
   23 |     int p=press(S);
      |           ^~~~~
combo.cpp:29:4: error: 'press' was not declared in this scope
   29 | if(press(ans+ot[0])==N) ans+=ot[0];
      |    ^~~~~