Submission #583088

#	Time	Username	Problem	Language	Result	Execution time	Memory
583088		Mystic03	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <vector>
#include <algorithm>
#include <string>

using namespace std;
std::string guess_sequence(int N) {
	string p = "";
	char c;
	vector<char> possible{ 'A', 'B', 'X', 'Y' };
	if (press("A")) {
		p.push_back('A');
		possible.erase(possible.begin() + 0);
	}
	else if (press("B")) {
		p.push_back('B');
		possible.erase(possible.begin() + 1);
	}
	else if (press("X")) {
		p.push_back('X');
		possible.erase(possible.begin() + 2);
	}
	else{
		p.push_back('Y');
		possible.erase(possible.begin() + 3);
	}
	for (int i = 1; i < N; i++) {
		for (char c : possible) {
			p.push_back(c);
			if (press(p) > i) break;
			p.pop_back();
		}
	}
	return p;

}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:10:6: error: 'press' was not declared in this scope
   10 |  if (press("A")) {
      |      ^~~~~
combo.cpp:29:8: error: 'press' was not declared in this scope
   29 |    if (press(p) > i) break;
      |        ^~~~~
combo.cpp:8:7: warning: unused variable 'c' [-Wunused-variable]
    8 |  char c;
      |       ^