Submission #439187

#	Time	Username	Problem	Language	Result	Execution time	Memory
439187		Idkwhoami	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

string guess_sequence(int N) {
    string ans = "Y";
    vector<string> tf = {"A", "B", "X"}, all = {"A", "B", "X", "Y"};
    for(auto t:tf){
        int x = press(t);
        if(x == 1) {
            ans = t;
            break;
        }
    }
    vector<string> possible;
    for(auto t:all){
        if(t != ans)possible.push_back(t);
    }
    

    string start = ans;
    if(N == 1)ans;

    while(ans.size() != N){

        string test1 = ans + possible[0] + ans + possible[1];

        int x = press(test1);
        if(x == ans.size()){
            ans = ans + possible[2];
        }
        else{
            x = press(ans + possible[0]);
            if(x == ans.size())ans = ans + possible[1];
            else ans = ans + possible[0];
        }
    }
    return ans;
}

Compilation message (stderr)

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