Submission #911379

#	Time	Username	Problem	Language	Result	Execution time	Memory
911379		Turcavid	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

string guess_sequence(int N)
{
    vector<char> v;
    v.push_back('A');
    v.push_back('B');
    v.push_back('X');
    v.push_back('Y');
    int del=4;
    string sus="";
    for(int i=0; i<3; i++)
    {
        sus.clear();
        sus.push_back(v[i]);
        if(press(sus) == 1)
            del=i;
    }
    string ans="";
    ans+=v[del];
    v.erase(v.begin()+del);
    for(int i=2; i<=N-1; i++)
    {
        string qr="";
        qr+=(ans+v[1]);
        qr+=(ans+v[2]+v[0]);
        qr+=(ans+v[2]+v[1]);
        qr+=(ans+v[2]+v[2]);
        int val=press(qr);
        if(val == i-1)
            ans+=v[0];
        if(val == i)
            ans+=v[1];
        if(val == i+1)
            ans+=v[2];
    }
    for(int i=0; i<3; i++)
    {
        string qr=ans;
        qr+=v[i];
        if(press(qr) == N)
            return qr;
    }
}

Compilation message (stderr)

combo.cpp:1:1: error: 'string' does not name a type
    1 | string guess_sequence(int N)
      | ^~~~~~