From 1acffe8867ef6699d059871972575fb15a30e4e3 Mon Sep 17 00:00:00 2001
From: Naxx-C <74910279+Naxx-C@users.noreply.github.com>
Date: Fri, 14 May 2021 11:31:19 +0800
Subject: [PATCH 1/3] =?UTF-8?q?Update=200151.=E7=BF=BB=E8=BD=AC=E5=AD=97?=
 =?UTF-8?q?=E7=AC=A6=E4=B8=B2=E9=87=8C=E7=9A=84=E5=8D=95=E8=AF=8D.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0151.翻转字符串里的单词.md | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/problems/0151.翻转字符串里的单词.md b/problems/0151.翻转字符串里的单词.md
index d9ecfc12..e975ef53 100644
--- a/problems/0151.翻转字符串里的单词.md
+++ b/problems/0151.翻转字符串里的单词.md
@@ -201,6 +201,21 @@ public:
         }
         return s;
     }
+    
+    /* 主函数简单写法
+    string reverseWords(string s) {
+        removeExtraSpaces(s);
+        reverse(s, 0, s.size() - 1);
+        for(int i = 0; i < s.size(); i++) {
+            int j = i;
+            // 查找单词间的空格，翻转单词
+            while(j < s.size() && s[j] != ' ') j++;
+            reverse(s, i, j - 1);
+            i = j;
+        }
+        return s;
+    }
+    */
 };
 ```
 

From 8eaba5884f9d499275c7c549eb4d846e8032fdc4 Mon Sep 17 00:00:00 2001
From: QuinnDK <39618652+QuinnDK@users.noreply.github.com>
Date: Fri, 14 May 2021 15:03:44 +0800
Subject: [PATCH 2/3] =?UTF-8?q?Update=200051.N=E7=9A=87=E5=90=8E.md?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 problems/0051.N皇后.md | 65 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/problems/0051.N皇后.md b/problems/0051.N皇后.md
index ac0235c2..935ea89c 100644
--- a/problems/0051.N皇后.md
+++ b/problems/0051.N皇后.md
@@ -363,7 +363,72 @@ Python：
 
 
 Go：
+```Go
+import "strings"
+var res [][]string
 
+func isValid(board [][]string, row, col int) (res bool){
+    n := len(board)
+    for i:=0; i < row; i++ {
+        if board[i][col] == "Q" {
+            return false
+        }
+    }
+    for i := 0; i < n; i++{
+        if board[row][i] == "Q" {
+            return false
+        }
+    }
+
+    for i ,j := row, col; i >= 0 && j >=0 ; i, j = i - 1, j- 1{
+        if board[i][j] == "Q"{
+            return false
+        }
+    }
+    for i, j := row, col; i >=0 && j < n; i,j = i-1, j+1 {
+        if board[i][j] == "Q" {
+            return false
+        }
+    }
+    return true
+}
+
+func backtrack(board [][]string, row int) {
+    size := len(board)
+    if row == size{
+        temp := make([]string, size)
+        for i := 0; i<size;i++{
+            temp[i] = strings.Join(board[i],"")
+        }
+        res =append(res,temp)
+        return 
+    }
+    for col := 0; col < size; col++ {
+        if !isValid(board, row, col){
+            continue
+        }
+        board[row][col] = "Q"
+        backtrack(board, row+1)
+        board[row][col] = "."
+    }
+}
+
+func solveNQueens(n int) [][]string {
+    res = [][]string{}
+    board := make([][]string, n)
+    for i := 0; i < n; i++{
+        board[i] = make([]string, n)
+    }
+    for i := 0; i < n; i++{
+        for j := 0; j<n;j++{
+            board[i][j] = "."
+        }
+    }
+    backtrack(board, 0)
+
+    return res
+}
+```
 
 
 

From a9fb92fc113bbd09d8e53691b3cf179f4c8f4605 Mon Sep 17 00:00:00 2001
From: faiz-lab <faiz_qiao@foxmail.com>
Date: Fri, 14 May 2021 15:28:50 +0800
Subject: [PATCH 3/3] =?UTF-8?q?=E6=B7=BB=E5=8A=A00106.=E4=BB=8E=E4=B8=AD?=
 =?UTF-8?q?=E5=BA=8F=E4=B8=8E=E5=90=8E=E5=BA=8F=E9=81=8D=E5=8E=86=E5=BA=8F?=
 =?UTF-8?q?=E5=88=97=E6=9E=84=E9=80=A0=E4=BA=8C=E5=8F=89=E6=A0=91=20JavaSc?=
 =?UTF-8?q?ript=E7=89=88?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 ...中序与后序遍历序列构造二叉树.md | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/problems/0106.从中序与后序遍历序列构造二叉树.md b/problems/0106.从中序与后序遍历序列构造二叉树.md
index e51cf08b..4cc2a88a 100644
--- a/problems/0106.从中序与后序遍历序列构造二叉树.md
+++ b/problems/0106.从中序与后序遍历序列构造二叉树.md
@@ -623,7 +623,21 @@ Python：
 Go：
 
 
-
+JavaScript
+```javascript
+var buildTree = function(inorder, postorder) {
+    if (!postorder.length) return null
+    
+    let root = new TreeNode(postorder[postorder.length - 1])
+    
+    let index = inorder.findIndex(number => number === root.val)
+    
+    root.left = buildTree(inorder.slice(0, index), postorder.slice(0, index))
+    root.right = buildTree(inorder.slice(index + 1, inorder.length), postorder.slice(index, postorder.length - 1))
+    
+    return root
+};
+```
 
 -----------------------
 * 作者微信：[程序员Carl](https://mp.weixin.qq.com/s/b66DFkOp8OOxdZC_xLZxfw)