896. 单调数列
public class Solution {
public bool IsMonotonic(int[] A) {
if (A.Length > 1)
{
var cmp = 0;
for (var i = 1; i < A.Length; i++)
{
var nextCmp = A[i - 1].CompareTo(A[i]);
if ((cmp ^ nextCmp) == -2)
return false;
cmp = cmp == 0 ? nextCmp : cmp;
}
}
return true;
}
}