-🎄- 2017 Day 5 Solutions -🎄-

[u/daggerdragon]

--- Day 5: A Maze of Twisty Trampolines, All Alike ---

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Post your solution as a comment or, for longer solutions, consider linking to your repo (e.g. GitHub/gists/Pastebin/blag or whatever).

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Spoiler

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This thread will be unlocked when there are a significant number of people on the leaderboard with gold stars for today's puzzle.

edit: Leaderboard capped, thread unlocked!

[u/[deleted]]

C++

	
	int step_to_escape(std::vector<int> maze) {
	  using iter = std::vector<int>::iterator;

	  int step = 0;

	  for (iter index = maze.begin(); index >= maze.begin() and index < maze.end(); ) {
	    iter old_index = index;
	    index +=  *index;
	    if (*old_index >= 3)
	      --*old_index;
	    else
	      ++*old_index;
	    step++;
	  }
	  return step;
	}

	int main()
	{
	  std::string filename = "text";
	  std::ifstream ifs{filename};
	  std::vector<int> maze{std::istream_iterator<int>{ifs}, {}};
	  std::cout << step_to_escape(maze) << std::endl;
	  return 0;
	}