Submission #675750

#	Time	Username	Problem	Language	Result	Execution time	Memory
675750		GGOSHAB	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <vector>
#include <random>

#define PI 3.14159265359

using namespace std;

typedef long long ll;
typedef unsigned long long ull;

typedef vector<int> bigInt;

const ull INF = -1;

string guess_sequence(int n) {
    string ans;
    ans.reserve(n);
    if (press("AB")) {
        if (press("A"))
            ans.push_back('A');
        else
            ans.push_back('B');
    }
    else {
        if (press("X"))
            ans.push_back('X');
        else
            ans.push_back('Y');
    }

    char ex = ans[0];
    string t, letters = "ABXY", tl;

    for (char c : letters)
        if (c != ex)
            tl.push_back(c);


    t.reserve(4 * n);
    for (int i = 2; i <= n; ++i) {
        for (int i = 0; i < 3; ++i) {
                t += ans;
                t.push_back(tl[i]);
        }
        int size = t.length() / 3;
        if (press(t.substr(0, size << 1))) {
            if (press(t.substr(0, size)))
                ans.push_back(tl[0]);
            else
                ans.push_back(tl[1]);
        }
        else {
            ans.push_back(tl[2]);
        }
    }
    
    return ans;
}

int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);

    //freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);



    return 0;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:19:9: error: 'press' was not declared in this scope
   19 |     if (press("AB")) {
      |         ^~~~~
combo.cpp:47:13: error: 'press' was not declared in this scope
   47 |         if (press(t.substr(0, size << 1))) {
      |             ^~~~~