Submission #87919

#	Time	Username	Problem	Language	Result	Execution time	Memory
87919		jhnah917	Combo (IOI18_combo)	C++14	5 / 100	2 ms	268 KiB

combo

#include "combo.h"
#include <vector>
using namespace std;

string guess_sequence(int N) {
	/*std::string p = "";
	for (int i = 0; i < 4 * N; ++i) {
		p += 'A';
	}
	int coins = press(p);
	std::string S = "";
	for (int i = 0; i < N; ++i) {
		S += 'A';
	}
	return S;*/
	
	string s = "";
	//i = 1
	if(press("AB") > 0){
		if(press("A") > 0) s = "A";
		else s = "B";
	}else if(press("X") > 0){
		s = "X";
	}else s = "Y";
	
	vector<string> arr(3);
	if(s == "A"){
		arr[0] = "B";
		arr[1] = "X";
		arr[2] = "Y";
	}
	else if(s == "B"){
		arr[0] = "A";
		arr[1] = "X";
		arr[2] = "Y";
	}
	else if(s == "X"){
		arr[0] = "A";
		arr[1] = "B";
		arr[2] = "Y";
	}
	else if(s == "Y"){
		arr[0] = "A";
		arr[1] = "B";
		arr[2] = "X";
	}
	
	//2~N-1
	for(int i=2; i<=N-1; i++){
		int value = press(s + arr[0] + arr[0] + s + arr[0] + arr[1] + s + arr[0] + arr[2] + s + arr[1]);
		if(value == s.size()) s += arr[2];
		else if(value == s.size()+2) s += arr[0];
		else s += arr[1];
	}
	
	//N
	if(press(s + arr[0]) > s.size()) s += arr[0];
	else if(press(s + arr[1]) > s.size()) s += arr[1];
	else s += arr[2];
	return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:51:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |   if(value == s.size()) s += arr[2];
      |      ~~~~~~^~~~~~~~~~~
combo.cpp:52:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |   else if(value == s.size()+2) s += arr[0];
      |           ~~~~~~^~~~~~~~~~~~~
combo.cpp:57:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |  if(press(s + arr[0]) > s.size()) s += arr[0];
      |     ~~~~~~~~~~~~~~~~~~^~~~~~~~~~
combo.cpp:58:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |  else if(press(s + arr[1]) > s.size()) s += arr[1];
      |          ~~~~~~~~~~~~~~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95