ACM summary twelve

In recent days in search of learning a deeper understanding of the depth of the search, the most popular understanding of many recent examples of big brother Maze given, a person is no way to spare, can only go in one direction is not up to target, do not hit the brick wall (border) Do not look back, to the border have not found the answer, and then backtracking. Breadth search, pick up similar glasses, glasses pick up a man lying on the ground, first hand the radius to find the radius where the depth is the hand, the hand that swept the breadth of scope, did not find it crawling forward a climb to reach the other depth. Doing to deal with the question of when the boundary conditions and constraints, do not forget to restore the site back when, when there is a tendency fastest in the title, you can go on thinking like a wide search, there are all possible words on the subject, to the deep search ideas on thought.