Submission #1062762

#	Time	Username	Problem	Language	Result	Execution time	Memory
1062762		Wasif_Shahzad	Combo (IOI18_combo)	C++17	10 / 100	34 ms	956 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

std::string guess_sequence(int N) {
  random_device rd;
  mt19937 g(rd());
  vector<char> moves = {'A', 'B', 'X', 'Y'};
  string ans;
  char first;
  for(int i = 0; i < N; i++){
    shuffle(moves.begin(), moves.end(), g);
    for(char option: moves){
      if(i != 0 and option == first) continue;
      string tmp = ans + option;
      int cur = press(tmp);
      if(cur == ans.size() + 1){
        ans = tmp;
        break;
      }
    }
    if(i == 0) first = ans[0];
  }      
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:18:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |       if(cur == ans.size() + 1){
      |          ~~~~^~~~~~~~~~~~~~~~~
combo.cpp:15:28: warning: 'first' may be used uninitialized in this function [-Wmaybe-uninitialized]
   15 |       if(i != 0 and option == first) continue;
      |                     ~~~~~~~^~~~~~~~

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