Submission #144644

#	Time	Username	Problem	Language	Result	Execution time	Memory
144644		aanji	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

string guess_sequence(int N)
{
    string s;
    char a='A', b='B', c='X';
    if(press("AB")) {
        if(press("A")) {
            s="A";
            a='Y';
        }
        else {
            b='Y';
            s="B";
        }
    }
    else {
        if(press("X")) {
            c='Y';
            s="X";
        }
        else s="Y";
    }
    while(s.size()<N-1) {
        int k=press(s+a+s+b+a+s+b+b+s+b+c);
        if(k==s.size()) s+=c;
        else if(k==s.size()+1) s+=a;
        else s+=b;
    }
    if(press(s+a)==s.size()+1) return s+a;
    if(press(s+b)==s.size()+1) return s+b;
    return s+c;
}

Compilation message (stderr)

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