제출 #945550

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
945550		Syrius	콤보 (IOI18_combo)	C++14	컴파일 에러	0 ms	0 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;

// #define int long long
#define pint pair < int , int >
#define ll long long
#define ff first
#define ss second
#define fast ios_base::sync_with_stdio(NULL); cin.tie(NULL)

const int inf = 1e9 + 9;
const int mxn = 2e5 + 2;
const int mod = 1e9 + 7;

// int press(string p) {}

string guess_sequence(int n) {

	int t1 = press("AB");
	int t2 = press("BX");

	char a , b , c , z;
	if (t1 == 0) {
		a = 'A';
		b = 'B';
		if (t2 == 0) {
			z = 'Y';
			c = 'X';
		} else {
			z = 'X';
			c = 'Y';
		}
	} else {
		c = 'Y';
		b = 'X';
		if (t2 == 0) {
			a = 'B';
			z = 'A';
		} else {
			a = 'A';
			z = 'B';
		}
	}

	string str;
	str = z;

	if (press(str) == 1) press('F');

	for (int i = 0; i < n-2; i++) {
		// int t = press(str + a + str + b + a + str + b + b + str + b + c);
		// int sz = str.size();

		// if (t - sz == 0) str += c;
		// else if (t - sz == 1) str += a;
		// else if (t - sz == 2) str += b;

		if (press(str + a) == str.size() + 1) str += a;
		else if (press(str + b) == str.size() + 1) str += b;
		else str += c;
	}

	if (press(str + a) == n) str += a;
	else if (press(str + b) == n) str += b;
	else str += c;

	// if (str.size() != n) press(str + 'F');
	return str;
}

컴파일 시 표준 에러 (stderr) 메시지

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:49:29: error: could not convert ''F'' from 'char' to 'std::string' {aka 'std::__cxx11::basic_string<char>'}
   49 |  if (press(str) == 1) press('F');
      |                             ^~~
      |                             |
      |                             char
combo.cpp:59:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |   if (press(str + a) == str.size() + 1) str += a;
      |       ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
combo.cpp:60:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   60 |   else if (press(str + b) == str.size() + 1) str += b;
      |            ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~