Merge pull request #414 from fusunx/master

0738.单调递增的数字.md Javascript  &&  0714.买卖股票的最佳时机.md Javascript && 0968.监控二叉树.md Javascript

Author: youngyangyang04

problems/0714.买卖股票的最佳时机含手续费.md

@@ -217,7 +217,29 @@ class Solution: # 贪心思路
 
 Go：
 
+Javascript:
+```Javascript
+// 贪心思路
+var maxProfit = function(prices, fee) {
+    let result = 0
+    let minPrice = prices[0]
+    for(let i = 1; i < prices.length; i++) {
+        if(prices[i] < minPrice) {
+            minPrice = prices[i]
+        }
+        if(prices[i] >= minPrice && prices[i] <= minPrice + fee) {
+            continue
+        }
 
+        if(prices[i] > minPrice + fee) {
+            result += prices[i] - minPrice - fee
+            // 买入和卖出只需要支付一次手续费
+            minPrice = prices[i] -fee
+        }
+    }
+    return result
+};
+```
 
 
 -----------------------

problems/0738.单调递增的数字.md

@@ -163,7 +163,30 @@ class Solution:
 
 Go：
 
+Javascript:
+```Javascript
+var monotoneIncreasingDigits = function(n) {
+    n = n.toString()
+    n = n.split('').map(item => {
+        return +item
+    })
+    let flag = Infinity
+    for(let i = n.length - 1; i > 0; i--) {
+        if(n [i - 1] > n[i]) {
+            flag = i
+            n[i - 1] = n[i - 1] - 1
+            n[i] = 9
+        }
+    }
+
+    for(let i = flag; i < n.length; i++) {
+        n[i] = 9
+    }
 
+    n = n.join('')
+    return +n
+};
+```
 
 
 -----------------------

problems/0968.监控二叉树.md

@@ -369,7 +369,42 @@ class Solution:
 ```
 Go：
 
+Javascript:
+```Javascript
+var minCameraCover = function(root) {
+    let result = 0
+    function traversal(cur) {
+        if(cur === null) {
+            return 2
+        }
+
+        let left = traversal(cur.left)
+        let right = traversal(cur.right)
+
+        if(left === 2 && right === 2) {
+            return 0
+        }
+
+        if(left === 0 || right === 0) {
+            result++
+            return 1
+        }
+
+        if(left === 1 || right === 1) {
+            return 2
+        }
+
+        return -1
+    }
 
+    if(traversal(root) === 0) {
+        result++
+    }
+
+    return result
+               
+};
+```
 
 
 -----------------------