Submission #1217985

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217985		islam_2010	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>
using namespace std;


string guess_sequence(int n) {
    string s;
    vector<char> candidates = {'A', 'B', 'X', 'Y'};

    string first_try = "AB";
    if (press(first_try) == 1) {
        if (press("A") == 1) {
            s = "A";
            candidates = {'B', 'X', 'Y'};
        } else {
            s = "B";
            candidates = {'A', 'X', 'Y'};
        }
    } else {
        if (press("X") == 1) {
            s = "X";
            candidates = {'A', 'B', 'Y'};
        } else {
            s = "Y";
            candidates = {'A', 'B', 'X'};
        }
    }

    while (s.size() < n) {
        bool found = false;
        for (char c : candidates) {
            int res = press(s + c);
            if (res == s.size() + 1) {
                s += c;
                found = true;
                break;
            }
        }
        if (!found && s.size() == n - 1) {
            for (char c : candidates) {
                if (press(s + c) == n) {
                    s += c;
                    break;
                }
            }
        }
    }

    return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:9: error: 'press' was not declared in this scope
   10 |     if (press(first_try) == 1) {
      |         ^~~~~
combo.cpp:31:23: error: 'press' was not declared in this scope; did you mean 'res'?
   31 |             int res = press(s + c);
      |                       ^~~~~
      |                       res
combo.cpp:40:21: error: 'press' was not declared in this scope
   40 |                 if (press(s + c) == n) {
      |                     ^~~~~