Submission #96583

#	Time	Username	Problem	Language	Result	Execution time	Memory
96583		jhnah917	Combo (IOI18_combo)	C++14	100 / 100	45 ms	556 KiB

combo

#include "combo.h"
#include <vector>
using namespace std;
 
string guess_sequence(int n){
	string S;
	if(press("AB")){
		if(press("A")) S = "A";
		else S = "B";
	}else{
		if(press("X")) S = "X";
		else S = "Y";
	}
	
	vector<string> v;
	if(S != "A") v.push_back("A");
	if(S != "B") v.push_back("B");
	if(S != "X") v.push_back("X");
	if(S != "Y") v.push_back("Y");
	
	string p = v[0], q = v[1], r = v[2];
	
	for(int i=2; i<n; i++){
		int sz = S.size();
		int now = press(S+p+p + S+p+q + S+p+r + S+q);
		if(now == sz+2) S += p;
		else if(now == sz+1) S += q;
		else S += r;
	}
	
	if(n != 1){
		if(press(S+p) > S.size()) S += p;
		else if(press(S+q) > S.size()) S += q;
		else S += r;
	}
	
	return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |   if(press(S+p) > S.size()) S += p;
      |      ~~~~~~~~~~~^~~~~~~~~~
combo.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |   else if(press(S+q) > S.size()) S += q;
      |           ~~~~~~~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 95 / 95