3168. Minimum Number of Chairs in a Waiting Room

You are given a string s. Simulate events at each second i: - If s[i] == 'E', a person enters the waiting room and takes one of the chairs in it. - If s[i] == 'L', a person leaves the waiting room, freeing up a chair. Return the minimum number of chairs needed so that a chair is available for every person who enters the waiting room given that it is initially empty. Example 1: Input: s = "E