message: Update separate-the-digits-in-an-array.cpp
diff: -// Time: O(n)
  +// Time: O(n * logr)
  // Space: O(1)
  // array
  @@ -16,7 +16,7 @@ public:
  }
  };
  -// Time: O(n)
  +// Time: O(n * logr)
  // Space: O(logr), r = max(nums)
  // array
  class Solution2 {
  