Submission #1242582

#	Time	Username	Problem	Language	Result	Execution time	Memory
1242582		JelaByteEngineer	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
#define int long long
using namespace std;
string guess_sequence (int N)
{
    string s="";
    int res=press("AX");
    if (res==0)
    {
        if (press("B")==1) s+='B';
        else s+='Y';
    }
    else if (res==1)
    {
        if (press("X")==1) s+='X';
        else s+='A';
    }
    else s+='A';
    char c=s[0];
    vector <char> mog(3);
    if (c=='A') mog={'B', 'X', 'Y'};
    else if (c=='B') mog={'A', 'X', 'Y'};
    else if (c=='X') mog={'A', 'B', 'Y'};
    else mog={'A', 'B', 'X'};
    for (int i=2; i<=N; i++)
    {
        string p=(s+mog[1])+(s+mog[2]+mog[1])+(s+mog[2]+mog[0])+(s+mog[2]+mog[2]);
        int res=press(p);
        if (res==s.size()) s+=mog[0];
        else if (res==s.size()+1) s+=mog[1];
        else if (res==s.size()+2) s+=mog[2];
    }
    return s;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/cc5qECWl.o: in function `main':
grader.cpp:(.text.startup+0x4c): undefined reference to `guess_sequence[abi:cxx11](int)'
collect2: error: ld returned 1 exit status