Submission #401526

#	Time	Username	Problem	Language	Result	Execution time	Memory
401526		_DaNeK_	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

char m[4] = {'A', 'B', 'Y', 'X'};

int press(string p)
{
    cout << p << "\n";
    int a;
    cin >> a;
    return a;
}

string guess_sequence(int N)
{
    string res = "";
    int cur = 0, i = 0, first = 0;
    while (i < 3 && press(res + m[i]) != cur + 1)
        ++i;
    res += m[i];
    first = i;
    cur = 1;
    while (res.size() < (unsigned int ) N)
    {
        int ind = 0, cnt = 0;
        bool f = true;
        while (cnt < 2 && f)
        {
            if (ind == first) continue ;
            if (press(res + m[ind]) == cur + 1)
                f = false;
            if (f)
            {
                ++cnt;
                ++ind;
            }
        }
        if (ind == first)
            ++ind;
        ++cur;
        res += m[ind];
    }
    return res;

}

Compilation message (stderr)

combo.cpp:4:11: error: 'string' was not declared in this scope
    4 | int press(string p)
      |           ^~~~~~
combo.cpp:12:1: error: 'string' does not name a type
   12 | string guess_sequence(int N)
      | ^~~~~~