Submission #1006763

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006763		makanhulia	Combo (IOI18_combo)	C++17	0 / 100	1 ms	344 KiB

combo

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

string guess_sequence(int N) {
  string S = "";
  char a;
  string p = "AB";
  int coins = press(p);
  if(coins){
    p = "A";
    coins = press(p);
    if(coins) a = 'A';
    else a = 'B';
  }
  else{
    p = "X";
    coins = press(p);
    if(coins) a = 'X';
    else a = 'Y';
  }
  S += a;
  vector <char> v;
  if(a != 'A') v.push_back('A');
  if(a != 'B') v.push_back('B');
  if(a != 'X') v.push_back('X');
  if(a != 'Y') v.push_back('Y');
  for(int i = 0; i < N-2; i++){
    p = "";
    for(int j = 0; j < 3; j++){
      if(j == 0){
        for(auto y : v) p += S + v[j] + y;
      }
      if(j == 1) p += S + v[j];
    }
    coins = press(p);
    if(coins == i+2) S += v[0];
    else if(coins == i+1) S += v[1];
    else S += v[2];
  }
  coins = press(p);
  p = S + v[0] + S + v[1];
  if(coins == N){
    p = S + v[0];
    coins = press(p);
    if(coins == N) S += v[0];
    else S += v[1];
  }
  else S += v[2];
  return S;
}

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