제출 #96506

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
96506		jhnah917	Combo (IOI18_combo)	C++14	100 / 100	48 ms	552 KiB

combo

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

string guess_sequence(int n){
	string ret;
	if(press("AB")){
		if(press("A")) ret = "A";
		else ret = "B";
	}else{
		if(press("X")) ret = "X";
		else ret = "Y";
	}
	
	vector<string> v;
	if(ret != "A") v.push_back("A");
	if(ret != "B") v.push_back("B");
	if(ret != "X") v.push_back("X");
	if(ret != "Y") v.push_back("Y");
	
	string a = v[0], b = v[1], c = v[2];
	
	for(int i=2; i<n; i++){
		int sz = ret.size();
		int now = press(ret+a+a + ret+a+b + ret+a+c + ret+b);
		if(now == sz+2) ret += a;
		else if(now == sz+1) ret += b;
		else ret += c;
	}
	
	if(n != 1){
		if(press(ret+a) > ret.size()) ret += a;
		else if(press(ret+b) > ret.size()) ret += b;
		else ret += c;
	}
	
	return ret;
}

컴파일 시 표준 에러 (stderr) 메시지

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:32:19: 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(ret+a) > ret.size()) ret += a;
      |      ~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:33:24: 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(ret+b) > ret.size()) ret += b;
      |           ~~~~~~~~~~~~~^~~~~~~~~~~~

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