제출 #729808

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
729808		2vas	콤보 (IOI18_combo)	C++17	컴파일 에러	0 ms	0 KiB

combo

// Source: https://usaco.guide/general/io

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


string guess_sequence(int N) {
	// get first letter
	int n = N;

	char first;
	char other[3];

	if (press("AB")) {
		if (press("A")) {
			first = 'A';
			other[0] = 'B';
			other[1] = 'X';
			other[2] = 'Y';
		} else {
			first = 'B';
			other[0] = 'A';
			other[1] = 'X';
			other[2] = 'Y';
		}
	} else {
		if (press("X")) {
			first = 'X';
			other[0] = 'B';
			other[1] = 'A';
			other[2] = 'Y';
		} else {
			first = 'Y';
			other[0] = 'A';
			other[1] = 'X';
			other[2] = 'B';
		}
	}

	string s = "" + first;

	while ((int) s.length() < n - 1) {
		string p = s + other[0] + other[1];
		p += s + other[0] + other[2];
		p += s + other[1] + other[2];
		int v = press(p);

		if (v == 0 + (int) s.length()) {
			s += other[2];
			continue;
		}

		if (v == 1 + (int) s.length()) {
			p = s + other[1] + other[1];
			v = press(p);
			if (v == 0 + (int) s.length()) {
				s += other[0] + other[0];
			} else if (v == 1 + (int) s.length()) {
				s += other[1] + other[0];
			} else {
				assert(v == 2 + (int) s.length());
				s += other[1] + other[1];
			}
			continue;
		}

		if (v == 2 + (int) s.length()) {
			p = s + other[0] + other[1];
			v = press(p);
			if (v == 0 + (int) s.length()) {
				s += other[1] + other[2];
			} else if (v == 1 + (int) s.length()) {
				s += other[0] + other[2];
			} else {
				assert(v == 2 + (int) s.length());
				s += other[0] + other[1];
			}
			continue;
		}
	}

	if ((int) s.length() == n) {
		return s;
	}


	if (press(s + other[0] + s + other[1]) == n) {
		if (press(s + other[0]) == n) {
			s += other[0];
		} else {
			s += other[1];
		}
	} else {
		s += other[2];
	}

	return s;

}

컴파일 시 표준 에러 (stderr) 메시지

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:14:6: error: 'press' was not declared in this scope
   14 |  if (press("AB")) {
      |      ^~~~~
combo.cpp:46:11: error: 'press' was not declared in this scope
   46 |   int v = press(p);
      |           ^~~~~
combo.cpp:87:6: error: 'press' was not declared in this scope
   87 |  if (press(s + other[0] + s + other[1]) == n) {
      |      ^~~~~