I like this idea because it is perfect for the city of Paris. Gorgeous Ottoman architecture, special lights on the Seine, streets throughout the city, lazy labyrinths in the lazy maze. In Paris, bring the same rosy shine to your skin, brighten the building, shape your thoughts into love songs, slow your pace and make it poetry. When I walk from time to time, I do not have candy, so I bite gum. On this day I took a walk on the Buttes Chaumont Park and chewed the gum until the gum's sugar was dispersed. I found a trash can and threw a gum into it, but I could not find it. I am a regular of Parc des Buttes Chaumont, I have a map that clearly shows the location of the trash can, but I could not find that day. It seems that they have all been deleted. I thought: is it now like London?
The DFS algorithm is like solving a maze. If you noticed that you have gone to a real maze or you solve the problem yourself on paper, the trick to solve the maze goes down the road until you stop obeying it Go back and go back to you please step until you find another possible way. Using this example, what you do when using DFS is to follow the path of the graph until you reach the dead end. If you reach a dead end, go back until you find another path that has not passed or passed through, then repeat this process. Finally, you can decide whether you can leave the maze, that is, whether there is a path between the start node and the end node.