feat: add solutions to lc problem: No.0171. Excel Sheet Column Number

Author: yanglbme

lcof/面试题58 - I. 翻转单词顺序/README.md

@@ -92,9 +92,9 @@ var reverseWords = function (s) {
 };
 ```
 
-### **C++**
+### **Go**
 
-```cpp
+```go
 func reverseWords(s string) string {
 	s = strings.Trim(s, " ")
 	n := len(s) - 1

solution/0100-0199/0171.Excel Sheet Column Number/README.md

@@ -52,15 +52,43 @@
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```python
-
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        res = 0
+        for c in columnTitle:
+            res = res * 26 + (ord(c) - ord('A') + 1)
+        return res
 ```
 
 ### **Java**
 
 <!-- 这里可写当前语言的特殊实现逻辑 -->
 
 ```java
+class Solution {
+    public int titleToNumber(String columnTitle) {
+        int res = 0;
+        for (char c : columnTitle.toCharArray()) {
+            res = res * 26 + (c - 'A' + 1);
+        }
+        return res;
+    }
+}
+```
 
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int titleToNumber(string columnTitle) {
+        int res = 0;
+        for (char c : columnTitle) {
+            res = res * 26 + (c - 'A' + 1);
+        }
+        return res;
+    }
+};
 ```
 
 ### **...**

solution/0100-0199/0171.Excel Sheet Column Number/README_EN.md

@@ -65,13 +65,41 @@ AB -> 28
 ### **Python3**
 
 ```python
-
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        res = 0
+        for c in columnTitle:
+            res = res * 26 + (ord(c) - ord('A') + 1)
+        return res
 ```
 
 ### **Java**
 
 ```java
+class Solution {
+    public int titleToNumber(String columnTitle) {
+        int res = 0;
+        for (char c : columnTitle.toCharArray()) {
+            res = res * 26 + (c - 'A' + 1);
+        }
+        return res;
+    }
+}
+```
 
+### **C++**
+
+```cpp
+class Solution {
+public:
+    int titleToNumber(string columnTitle) {
+        int res = 0;
+        for (char c : columnTitle) {
+            res = res * 26 + (c - 'A' + 1);
+        }
+        return res;
+    }
+};
 ```
 
 ### **...**

solution/0100-0199/0171.Excel Sheet Column Number/Solution.cpp

@@ -0,0 +1,10 @@
+class Solution {
+public:
+    int titleToNumber(string columnTitle) {
+        int res = 0;
+        for (char c : columnTitle) {
+            res = res * 26 + (c - 'A' + 1);
+        }
+        return res;
+    }
+};

solution/0100-0199/0171.Excel Sheet Column Number/Solution.java

@@ -1,12 +1,9 @@
 class Solution {
-    public int titleToNumber(String s) {
-        char[] cs = s.toCharArray();
-        int n = 0;
-        int p = 1;
-        for (int i = cs.length-1; i >= 0; i--) {
-            n += (cs[i]-'A'+1)*p;
-            p *= 26;
+    public int titleToNumber(String columnTitle) {
+        int res = 0;
+        for (char c : columnTitle.toCharArray()) {
+            res = res * 26 + (c - 'A' + 1);
         }
-        return n;
+        return res;
     }
 }

solution/0100-0199/0171.Excel Sheet Column Number/Solution.py

@@ -0,0 +1,6 @@
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        res = 0
+        for c in columnTitle:
+            res = res * 26 + (ord(c) - ord('A') + 1)
+        return res