# Given a string s, sort it in decreasing order based on the frequency of the characters. # The frequency of a character is the number of times it appears in the string. # Return the sorted string. If ...

# You are given an array of binary strings strs and two integers m and n. # Return the size of the largest subset of strs such that there are at most m 0's and n 1's in the subset. # A set x is a ...