add: 验证回文字符串 Ⅱ

src/array/maximum-product-subarray.js

@@ -0,0 +1,18 @@
+/**
+ * @param {number[]} nums
+ * @return {number}
+ */
+export const maxProduct = function (nums) {
+  let res = nums[0]
+  let prevMin = nums[0]
+  let prevMax = nums[0]
+  let tmp1 = 0; let tmp2 = 0
+  for (let i = 1; i < nums.length; i++) {
+    tmp1 = prevMin * nums[i]
+    tmp2 = prevMax * nums[i]
+    prevMin = Math.min(tmp1, tmp2, nums[i])
+    prevMax = Math.max(tmp1, tmp2, nums[i])
+    res = Math.max(prevMax, res)
+  }
+  return res
+}