solve problem Excel Sheet Column Title

Author: P-ppc

README.md

@@ -25,6 +25,7 @@ All solutions will be accepted!
 |821|[Shortest Distance To A Character](https://leetcode-cn.com/problems/shortest-distance-to-a-character/description/)|[java/py/js](./algorithms/ShortestDistanceToACharacter)|Easy|
 |371|[Sum Of Two Integers](https://leetcode-cn.com/problems/sum-of-two-integers/description/)|[java/py/js](./algorithms/SumOfTwoIntegers)|Easy|
 |171|[Excel Sheet Column Number](https://leetcode-cn.com/problems/excel-sheet-column-number/description/)|[java/py/js](./algorithms/ExcelSheetColumnNumber)|Easy|
+|168|[Excel Sheet Column Title](https://leetcode-cn.com/problems/excel-sheet-column-title/description/)|[java/py/js](./algorithms/ExcelSheetColumnTitle)|Easy|
 |13|[Roman To Integer](https://leetcode-cn.com/problems/roman-to-integer/description/)|[java/py/js](./algorithms/RomanToInteger)|Easy|
 |155|[Min Stack](https://leetcode-cn.com/problems/min-stack/description/)|[java/py/js](./algorithms/MinStack)|Easy|
 |232|[Implement Queue Using Stacks](https://leetcode-cn.com/problems/implement-queue-using-stacks/description/)|[java/py/js](./algorithms/ImplementQueueUsingStacks)|Easy|

algorithms/ExcelSheetColumnTitle/README.md

@@ -0,0 +1,2 @@
+# Excel Sheet Column Title
+This problem is easy to solve

algorithms/ExcelSheetColumnTitle/Solution.java

@@ -0,0 +1,19 @@
+class Solution {
+    public String convertToTitle(int n) {
+        String res = "";
+        
+        while (n > 0) {
+            int mod = n % 26;
+            n /= 26;
+            
+            if (mod == 0) {
+                n--;
+                mod = 26;
+            }
+            
+            res = new String(new char[]{(char) (mod + 64)}) + res;
+        }
+        
+        return res;
+    }
+}

algorithms/ExcelSheetColumnTitle/solution.js

@@ -0,0 +1,21 @@
+/**
+ * @param {number} n
+ * @return {string}
+ */
+var convertToTitle = function(n) {
+    let res = ''
+    
+    while (n > 0) {
+        let mod = n % 26
+        n = parseInt(n / 26)
+        
+        if (mod === 0) {
+            mod = 26
+            n--
+        }
+        
+        res = String.fromCharCode(mod + 64) + res
+    }
+    
+    return res
+};

algorithms/ExcelSheetColumnTitle/solution.py

@@ -0,0 +1,18 @@
+class Solution(object):
+    def convertToTitle(self, n):
+        """
+        :type n: int
+        :rtype: str
+        """
+        res = ''
+        
+        while n > 0:
+            mod = n % 26
+            n /= 26
+            
+            if mod == 0:
+                n -= 1
+                mod = 26
+            res = chr(mod + 64) + res
+            
+        return res