Submission #362150

#	Time	Username	Problem	Language	Result	Execution time	Memory
362150		penguinhacker	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

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

#define ll long long
#define ar array

string guess_sequence(int n) {
	string ans;
	if (press("AB") > 0) {
		if (press("A")) ans = "A";
		else ans = "B";
	}
	else {
		if (press("X")) ans = "X";
		else ans = "Y";
	}
	assert((int)ans.size() == 1);
	vector<char> v;
	if (ans != "A") v.push_back('A');
	if (ans != "B") v.push_back('B');
	if (ans != "X") v.push_back('X');
	if (ans != "Y") v.push_back('Y');
	assert(v.size() == 3);
	for (int i = 1; i < n - 1; ++i) {
		string s = ans + v[0] + v[0] + ans + v[0] + v[1] + ans + v[0] + v[2] + ans + v[1];
		assert((int)s.size() <= 4 * n);
		int x = press(s);
		if (x == i) ans += v[2];
		else if (x == i + 1) ans += v[1];
		else if (x == i + 2) ans += v[0];
		else assert(0);
	}
	assert((int)ans.size() == n - 1);
	if (press(ans + v[0]) == n) ans += v[0];
	else if (press(ans + v[1]) == n) ans += v[1];
	else ans += v[2];
	assert((int)ans.size() == n);
	return ans;
}

/*int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	
	return 0;
}
*/

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:6: error: 'press' was not declared in this scope
    9 |  if (press("AB") > 0) {
      |      ^~~~~
combo.cpp:27:11: error: 'press' was not declared in this scope
   27 |   int x = press(s);
      |           ^~~~~
combo.cpp:34:6: error: 'press' was not declared in this scope
   34 |  if (press(ans + v[0]) == n) ans += v[0];
      |      ^~~~~