Submission #161134

#	Time	Username	Problem	Language	Result	Execution time	Memory
161134		InkretBear	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

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

/*int press(string a){
	int x;
	cout << "querying " << a << endl;
	cin >> x;
	return x;
}*/

string guess_sequence(int n){
	int q=press("AB"),w=press("AX");
	char s[4]={'A','B','X','Y'};
	if (q && w){
		swap(s[0],s[3]);
	}
	if (q && !w){
		swap(s[1],s[3]);
	}
	if (!q && w){
		swap(s[2],s[3]);
	}
	string res,u;
	res.push_back(s[3]);
	for (int i=1;i<n-1;++i){
		u.clear();
		for (int j=0;j<i;++j){
			u.push_back(res[j]);
		}
		u.push_back(s[1]);
		for (int j=0;j<i;++j){
			u.push_back(res[j]);
		}
		u.push_back(s[0]);
		u.push_back(s[0]);
		for (int j=0;j<i;++j){
			u.push_back(res[j]);
		}
		u.push_back(s[0]);
		u.push_back(s[2]);
		for (int j=0;j<i;++j){
			u.push_back(res[j]);
		}
		u.push_back(s[0]);
		u.push_back(s[1]);
		q=press(u);
		if (q==i){
			res.push_back(s[2]);
		}
		if (q==i+1){
			res.push_back(s[1]);
		}
		if (q==i+2){
			res.push_back(s[0]);
		}
	}
	u.clear();
	for (int i=0;i<n-1;++i){
		u.push_back(res[i]);
	}
	u.push_back(s[0]);
	q=press(u);
	u.clear();
	for (int i=0;i<n-1;++i){
		u.push_back(res[i]);
	}
	u.push_back(s[1]);
	w=press(u);
	if (q==n){
		res.push_back(s[0]);
	}
	else if (w==n){
		res.push_back(s[1]);
	}
	else {
		res.push_back(s[2]);
	}
	return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:12:8: error: 'press' was not declared in this scope
   12 |  int q=press("AB"),w=press("AX");
      |        ^~~~~
combo.cpp:14:11: error: 'w' was not declared in this scope
   14 |  if (q && w){
      |           ^
combo.cpp:17:12: error: 'w' was not declared in this scope
   17 |  if (q && !w){
      |            ^
combo.cpp:20:12: error: 'w' was not declared in this scope
   20 |  if (!q && w){
      |            ^
combo.cpp:68:2: error: 'w' was not declared in this scope
   68 |  w=press(u);
      |  ^