Create 3105-longest-strictly-increasing-or-strictly-decreasing-subarray.js

Author: everthis

3105-longest-strictly-increasing-or-strictly-decreasing-subarray.js

@@ -0,0 +1,36 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+var longestMonotonicSubarray = function(nums) {
+  const n = nums.length
+  return Math.max(inc(), desc()) 
+    
+  function inc() {
+    let res = 1, cur = 1
+    for(let i = 1; i < n; i++) {
+      if(nums[i] > nums[i - 1]) {
+        cur++
+        res = Math.max(res, cur)
+      } else {
+        cur = 1
+      }
+    }
+    
+    return res
+  }
+  
+  function desc() {
+    let res = 1, cur = 1
+    for(let i = 1; i < n; i++) {
+      if(nums[i] < nums[i - 1]) {
+        cur++
+        res = Math.max(res, cur)
+      } else {
+        cur = 1
+      }
+    }
+    
+    return res
+  }
+};