Submission #125665

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
125665	2019-07-06 07:44:46	dragoon	Combo (IOI18_combo)	C++14	97 / 100	301 ms	2064 KiB

combo

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
#include "combo.h"
#include<string>
#include <assert.h>
#include <iostream>
#include <algorithm>
using namespace std;
string FindFirstChar() {
  if (press("AB")) {
    if (press("A")) return "A";
    else return "B";
  }
  if (press("X")) return "X";
  return "Y";
}
string guess_sequence(int N) {
  string now = FindFirstChar();
  if (N == 1) return now;
  string remaining = "ABXY";
  remaining.erase(find(remaining.begin(), remaining.end(), now[0]));
  for (int i = 2; i < N; i++) {
    string current = (now + remaining[0])
      + (now + remaining[1] + remaining[0])
      + (now + remaining[1] + remaining[1])
      + (now + remaining[1] + remaining[2]);
    int coin = press(current);
    if (coin == i - 1) now.push_back(remaining[2]);
    else if (coin == i) now.push_back(remaining[0]);
    else now.push_back(remaining[1]);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

• Subtask 1: 5 / 5
• Subtask 2: 92 / 95