제출 #554907

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
554907		d4xn	콤보 (IOI18_combo)	C++17	5 / 100	1 ms	336 KiB

combo

#include "combo.h"

#pragma GCC optimize ("Ofast")
#include <bits/stdc++.h>
using namespace std;

#define pb push_back

string guess_sequence(int N) {
  string p;

  string dict1 = "ABXY";

  int x = press("AB");
  if (x >= 1) {
    if (press("A")) {
      p.pb('A');
    }
    else {
      p.pb('B');
    }
  }
  else {
    if (press("X")) {
      p.pb('X');
    }
    else {
      p.pb('Y');
    }
  }

  string dict2;
  for (char &c : dict1) {
    if (c == p[0]) continue;
    dict2.pb(c);
  }

  for (int i = 1; i < N-1; i++) {
    string s1 = p;
    s1.pb(dict2[0]);

    string s2 = p;
    s2.pb(dict2[1]);
    s2.pb(dict2[0]);

    string s3 = p;
    s3.pb(dict2[1]);
    s3.pb(dict2[1]);

    string s4 = p;
    s4.pb(dict2[1]);
    s4.pb(dict2[2]);

    string total = s1 + s2 + s3 + s4;
    cerr << total << endl;
    assert(total.size() <= 4*N);
    int y = press(total);
    if (y == i+1) {
      p.pb(dict2[0]);
    }
    else if (y == i+2) {
      p.pb(dict2[1]);
    }
    else {
      p.pb(dict2[2]);
    }
  }

  assert(p.size() == N-1);
  for (int i = 0; i < 2; i++) {
    char c = dict2[i];
    p.pb(c);
    if (press(p) == N) break;
    p.pop_back();
  }

  if (p.size() < N) {
    p.pb(dict2[2]);
  }

  return p;
}

컴파일 시 표준 에러 (stderr) 메시지

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from combo.cpp:4:
combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:56:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   56 |     assert(total.size() <= 4*N);
      |            ~~~~~~~~~~~~~^~~~~~
combo.cpp:69:19: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   69 |   assert(p.size() == N-1);
      |          ~~~~~~~~~^~~~~~
combo.cpp:77:16: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   77 |   if (p.size() < N) {
      |       ~~~~~~~~~^~~

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