제출 #787199

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
787199		resolve100	콤보 (IOI18_combo)	C++14	0 / 100	1 ms	256 KiB

combo

#include<bits/stdc++.h>
#include "combo.h"
#define ll long long
#define ull unsigned ll
#define pb push_back
#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define read_file freopen("input.txt", "r", stdin); freopen("output.txt", "w", stdout);


using namespace std;

string chars[] = {"A", "B", "X", "Y"};

string guess_sequence(int N){
	string out;

	if (N == 0) return out;
	int no;
	for (int i = 0; i < 3; i++){
		int num = press(chars[i]);
		if (num){
			out.append(chars[i]);
			no = i;
			break;
		}
	}
	if (out.size() == 0) {
		out.append(chars[3]);
		no = 3;
	}

	for (int i = 1; i < N; i++){
		if (no == 3){
			for (int j = 0; j < 2; j ++){
				int num = press(out+chars[j]);
				if (num == j+1){
					out.append(chars[j]);
					break;
				}
			}
			if (out.size() == i) out.append(chars[2]);
		}
		else{
			for (int j = 0; j < 3; j++){
				if (j == no) continue;
				int num = press(out+chars[j]);
				if (num == i+1){
					out.append(chars[j]);
					break;
				}
			}
			if (out.size() == i) out.append(chars[3]);
		}
	
	}
	return out;
}

컴파일 시 표준 에러 (stderr) 메시지

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:41:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   41 |    if (out.size() == i) out.append(chars[2]);
      |        ~~~~~~~~~~~^~~~
combo.cpp:52:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   52 |    if (out.size() == i) out.append(chars[3]);
      |        ~~~~~~~~~~~^~~~
combo.cpp:45:5: warning: 'no' may be used uninitialized in this function [-Wmaybe-uninitialized]
   45 |     if (j == no) continue;
      |     ^~

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