Submission #1284067

#	Time	Username	Problem	Language	Result	Execution time	Memory
1284067		hssaan_arif	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

string guess_sequence(int N) {
    int n = N;
    string s = "AA" ;
    string F = "" , X = "";
    int p = press(s);
    if (p){
        F = "A";
        if (p == 2){
            X = "A";
        }else{
            string s = "AB";
            int p = press(s);
            if (p == 2){
                X = "B";
            }else{
                s = "AX";
                p = press(s);
                if (p == 2){
                    X = "X";
                }else{
                    s = "AY";
                    p = press(s);
                    if (p == 2){
                        X = "Y";
                    }
                }
            }
        }
    }else{
        s = "BA" ;
        p = press(s);
        if (p){
            F = "B";
            if (p == 2){
                X = "A";
            }
        }else{
            s = "XA" ;
            p = press(s);
            if (p){
                F = "X";
                if (p == 2){
                    X = "A";
                }
            }else{
                s = "YA" ;
                p = press(s);
                if (p){
                    F = "Y";
                    if (p == 2){
                        X = "A";
                    }
                }
            }
        }
    }
    vector<string> S;
    if (F != "A"){
        S.pb("A");
    }
    if (F != "B"){
        S.pb("B");
    }
    if (F != "X"){
        S.pb("X");
    }
    if (F != "Y"){
        S.pb("Y");
    }
    string ans = "";
    ans += F;
    ans += X;
    for (int i = 2 ; i < n ; i++){
        // cout << ans << " ";
        if (i == n-1){
            string s = "";
            s += ans;
            s += S[0];
            int p = press(s);
            if (p == i+1){
                ans += S[0];
                continue;
            }
            s = "";
            s += ans;
            s += S[1];
            p = press(s);
            if (p == i+1){
                ans += S[1];
                continue;
            }
            ans += S[2];
            continue;
        }
        string s = "";
        s += ans;
        s += S[0];
        s += ans;
        s += S[1];
        s += S[0];
        s += ans;
        s += S[1];
        s += S[1];
        s += ans;
        s += S[1];
        s += S[2];
        cout << s << endl;
        int p = press(s);
        if (p == i){
            ans += S[2];
        }else if (p == i+1){
            ans += S[0];
        }else{
            ans += S[1];
        }
    }
    return ans;

}

Compilation message (stderr)

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