Merge pull request youngyangyang04#1336 from Hanmengnan/master

更新0516.最长回文子序列的Go实现提供了一种更优的方法

Author: youngyangyang04

problems/0516.最长回文子序列.md

@@ -186,29 +186,28 @@ class Solution:
 Go：
 ```Go
 func longestPalindromeSubseq(s string) int {
-	lenth:=len(s)
-	dp:=make([][]int,lenth)
-	for i:=0;i<lenth;i++{
-		for j:=0;j<lenth;j++{
-			if dp[i]==nil{
-				dp[i]=make([]int,lenth)
-			}
-			if i==j{
-				dp[i][j]=1
-			}
+	size := len(s)
+	max := func(a, b int) int {
+		if a > b {
+			return a
 		}
+		return b
 	}
-	for i:=lenth-1;i>=0;i--{
-		for j:=i+1;j<lenth;j++{
-			if s[i]==s[j]{
-				dp[i][j]=dp[i+1][j-1]+2
-			}else {
-				dp[i][j]=max(dp[i+1][j],dp[i][j-1])
+	dp := make([][]int, size)
+	for i := 0; i < size; i++ {
+		dp[i] = make([]int, size)
+		dp[i][i] = 1
+	}
+	for i := size - 1; i >= 0; i-- {
+		for j := i + 1; j < size; j++ {
+			if s[i] == s[j] {
+				dp[i][j] = dp[i+1][j-1] + 2
+			} else {
+				dp[i][j] = max(dp[i][j-1], dp[i+1][j])
 			}
 		}
 	}
-
-	return dp[0][lenth-1]
+	return dp[0][size-1]
 }
 ```