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896. Monotonic Array 👍

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class Solution {
 public:
  bool isMonotonic(vector<int>& nums) {
    bool increasing = true;
    bool decreasing = true;

    for (int i = 1; i < nums.size(); ++i) {
      increasing &= nums[i] >= nums[i - 1];
      decreasing &= nums[i] <= nums[i - 1];
    }

    return increasing || decreasing;
  }
};

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class Solution {
  public boolean isMonotonic(int[] nums) {
    boolean increasing = true;
    boolean decreasing = true;

    for (int i = 1; i < nums.length; ++i) {
      increasing &= nums[i] >= nums[i - 1];
      decreasing &= nums[i] <= nums[i - 1];
    }

    return increasing || decreasing;
  }
}

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class Solution:
  def isMonotonic(self, nums: list[int]) -> bool:
    increasing = True
    decreasing = True

    for i in range(1, len(nums)):
      increasing &= nums[i - 1] <= nums[i]
      decreasing &= nums[i - 1] >= nums[i]

    return increasing or decreasing