Submission #718804

#	Time	Username	Problem	Language	Result	Execution time	Memory
718804		thimote75	Combo (IOI18_combo)	C++14	100 / 100	34 ms	576 KiB

combo

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

string guess_start () {
  if (press("AB") >= 1) {
    if (press("A") == 1) return "A";
    return "B";
  }

  if (press("X") == 1) return "X";
  return "Y";
}

string state;
string start;

string h[3];
string H_map[] = { "A", "B", "X", "Y" };

void setup () {
  int jH = 0;
  for (int iH = 0; iH < 4; iH ++) {
    if (H_map[iH] == start) continue ;

    h[jH] = H_map[iH];
    jH ++;
  }
}

string get_next () {
  string guess = state + h[0] + h[0]
               + state + h[0] + h[1]
               + state + h[0] + h[2]
               + state + h[1];
  
  int res = press(guess);

  if (res == state.size() + 2) return h[0];
  if (res == state.size() + 1) return h[1];
  return h[2];
}

string get_end (int N) {
  if (press(state + h[0]) == N) return h[0];
  if (press(state + h[1]) == N) return h[1];

  return h[2];
}

string guess_sequence(int N) {
  start = guess_start();
  state = start;

  setup();

  for (int i = 1; i + 1 < N; i ++)
    state += get_next();
  
  if (N != 1)
    state += get_end(N);

  return state;
}

Compilation message (stderr)

combo.cpp: In function 'std::string get_next()':
combo.cpp:39:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |   if (res == state.size() + 2) return h[0];
      |       ~~~~^~~~~~~~~~~~~~~~~~~
combo.cpp:40:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   40 |   if (res == state.size() + 1) return h[1];
      |       ~~~~^~~~~~~~~~~~~~~~~~~

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