MaxCounters 출처: https://app.codility.com/programmers/lessons 문제 설명 You are given N counters, initially set to 0, and you have two possible operations on them: increase(X) − counter X is increased by 1, max counter − all counters are set to the maximum value of any counter. A non-empty array A of M integers is given. This array represents consecutive operations: if A[K] = X, such that 1 ≤ X ≤ N, ..