"Stick Soldier" Game

In the game Stick Soldier soldier has an important mission - he needs to sneak into the enemy rear and get secret information: how many people are there and what military equipment. To sneak in inconspicuously, our hero will have to go from the mountains - that's where from, but the enemies do not wait for the spies. They have not even posted guards to protect the property. Fortunately, the hero is not afraid of obstacles and dangers - he is ready to overcome any difficulties to complete his task. Although the trails are narrow (only birds fly over them), the soldier has figured out a way to navigate through them. He decided to take a sturdy stick with him - it will serve him as a temporary bridge. Your task is to constantly adjust the length of the stick so that it is the right size, otherwise the hero will fall into the abyss.