# Is there a good ratio between the positive and negative rewards in reinforcement learning?

Is there an ideal ratio in reinforcement learning between the positive and negative rewards?

Suppose I have the scenario of moving a robot across the river. There are two options, walk across the bridge or walk across the river. If it walks across the river then the robot breaks so the idea is to reinforce the robot to walk across the bridge. What would be the best rewards values? Does this ratio vary between cases?

option1:

Bridge: +10
River: -10

Option2:

Bridge: +10
River: -1

Option3:

Bridge: +1
River: -10