Submission #115535

#	Time	Username	Problem	Language	Result	Execution time	Memory
115535		suzy	Combo (IOI18_combo)	C++17	Compilation error	0 ms	0 KiB

combo

#include <iostream>
#include <string>

using namespace std;

string guess_sequence(int n) {
	string s;
	char c[3]; int k;
	if(press("A")) s="A";
	else if(press("B")) s="B";
	else if(press("X")) s="X";
	else s="Y";
	if(s[0]!='A') c[k++]='A';
	if(s[0]!='B') c[k++]='B';
	if(s[0]!='X') c[k++]='X';
	if(s[0]!='Y') c[k++]='Y';
	for(int i=0;i<n-1;i++)
		s+=c[0];
	int pre=press(s);
	for(int i=1;i<n;i++) {
		s[i]=c[1];
		int cur=press(s);
		if(pre>cur) s[i]=c[0];
		else if(pre<cur) {
			s[i]=c[1];
			pre++;
		} else {
			s[i]=c[2];
			pre++;
		}
	}
	return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:5: error: 'press' was not declared in this scope
    9 |  if(press("A")) s="A";
      |     ^~~~~
combo.cpp:19:10: error: 'press' was not declared in this scope; did you mean 'pre'?
   19 |  int pre=press(s);
      |          ^~~~~
      |          pre