Submission #545518

#	Time	Username	Problem	Language	Result	Execution time	Memory
545518		Sergio_2357	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <bits/stdc++.h>

using namespace std;

char get_start()
{
    int p = press("AB");
    if (p == 0) {
        int p2 = press("X");
        if (p2 == 0) {
            return 'Y';
        } else {
            return 'X';
        }
    } else {
        int p2 = press("A");
        if (p2 == 0) {
            return 'B';
        } else {
            return 'A';
        }
    }
}

string guess_sequence(int n)
{
    vector<char> letters = { 'A', 'B', 'X', 'Y' };
    if (n == 0)
        return "";
    char start;
    start = get_start();
    string combo(1, start);
    remove(letters.begin(), letters.end(), start);
    while (combo.size() < n) {
        combo = expand_size(combo, n, letters);
    }
    return combo;
}

Compilation message (stderr)

combo.cpp: In function 'char get_start()':
combo.cpp:7:13: error: 'press' was not declared in this scope
    7 |     int p = press("AB");
      |             ^~~~~
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:34:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   34 |     while (combo.size() < n) {
      |            ~~~~~~~~~~~~~^~~
combo.cpp:35:17: error: 'expand_size' was not declared in this scope
   35 |         combo = expand_size(combo, n, letters);
      |                 ^~~~~~~~~~~