Submission #1305857

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305857		farica	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

//#include "combo.h"
#include <bits/stdc++.h>
typedef long long ll;

using namespace std;
using vi = vector<int>;
using pi = pair<int,int>;
string guess_sequence(int N) {
	string ans = "";
	int tmp = press("AB");
	if(!tmp) {
		tmp = press("XAXBXY");
		if(tmp == 1) ans = "Y";
		else ans = "X";
	} else {
		tmp = press("ABAXAY");
		if(tmp == 1) ans = "B";
		else ans = "A";
	}
	int prev = 1;
	char c[4] = {'A', 'B', 'X', 'Y'};
	for(int i=1; i<N; ++i) {
		for(char ch: c) {
			tmp = press(ans + ch);
			if(tmp == prev+1) {
				ans += ch;
				++prev;
				break;
			}
		}
	}
	return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:19: error: 'press' was not declared in this scope
   10 |         int tmp = press("AB");
      |                   ^~~~~