Submission #1271601

#	Time	Username	Problem	Language	Result	Execution time	Memory
1271601		david_g611	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>

using namespace std;

string guess_sequence(int N)
{
    char first;
    if(press("AB"))
    {
        if(press("A"))
            first='A';
        else
            first='B';
    }
    else
    {
        if(press("X"))
            first='X';
        else
            first='Y';
    }
    string s="";
    s+=first;
    char f1, f2, f3;
    if(first=='A')f1='B', f2='X', f3='Y';
    if(first=='B')f1='A', f2='X', f3='Y';
    if(first=='X')f1='B', f2='Y', f3='A';
    if(first=='Y')f1='B', f2='X', f3='A';

    for(int i=2; i<=N-1; i++)
    {
        string p="";
        p+=s;p+=f1;p+=f1;
        p+=s;p+=f1;p+=f2;
        p+=s;p+=f1;p+=f3;
        p+=s;p+=f2;
        int creste=press(p)-s.size();
        if(creste==2)s+=f1;
        if(creste==1)s+=f2;
        if(creste==0)s+=f3;
    }
    string p="";
    p=s+f1+s+f2;
    if(press(p) == N)
    {
        p=s+f1;
        if(press(p)==N)
            s+=f1;
        else
            s+=f2;
    }
    else
        s+=f3;
    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:8:8: error: 'press' was not declared in this scope
    8 |     if(press("AB"))
      |        ^~~~~
combo.cpp:37:20: error: 'press' was not declared in this scope
   37 |         int creste=press(p)-s.size();
      |                    ^~~~~
combo.cpp:44:8: error: 'press' was not declared in this scope
   44 |     if(press(p) == N)
      |        ^~~~~