Merge pull request youngyangyang04#2517 from markwang1992/master

977.有序数组的平方Go排序法

Author: youngyangyang04

problems/0977.有序数组的平方.md

@@ -181,6 +181,17 @@ class Solution:
 ### Go：
 
 ```Go
+// 排序法
+func sortedSquares(nums []int) []int {
+    for i, val := range nums {
+        nums[i] *= val
+    }
+    sort.Ints(nums)
+    return nums
+}
+```
+```Go
+// 双指针法
 func sortedSquares(nums []int) []int {
 	n := len(nums)
 	i, j, k := 0, n-1, n-1