🔈 문제You are given a string s consisting of the characters 'a', 'b', and 'c' and a non-negative integer $k$. Each minute, you may take either the leftmost character of s, or the rightmost character of s.Return the minimum number of minutes needed for you to take at least $k$ of each character, or return -1 if it is not possible to take $k$ of each character. 💫 예시Input: s = "aabaaaacaabc", k = 2..