From ef65ca38bb4e21f466f359ca31432f5cc89b2f9d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sezai=20Burak=20Kantarc=C4=B1?=
 <45287996+kantarcise@users.noreply.github.com>
Date: Sat, 11 Nov 2023 22:53:58 +0300
Subject: [PATCH] ord and enumerate. lower is cool :love:

---
 .../easy/171_excel_sheet_column_number.py     | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 Leet_Code/easy/171_excel_sheet_column_number.py

diff --git a/Leet_Code/easy/171_excel_sheet_column_number.py b/Leet_Code/easy/171_excel_sheet_column_number.py
new file mode 100644
index 00000000..538601b5
--- /dev/null
+++ b/Leet_Code/easy/171_excel_sheet_column_number.py
@@ -0,0 +1,21 @@
+# my first approach
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        result = 0
+        
+        j = 1
+        for i in range(len(columnTitle)-1, -1, -1):
+            # result = ord(f"{columnTitle[i].lower()}") * j
+            result += (ord(columnTitle[i].lower()) - ord('a') + 1) * j
+            j *= 26
+            
+        return result
+
+# fast and clean
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        out = 0
+        for i, x in enumerate(columnTitle[::-1]):
+            out += (ord(x) - 64) * 26**i
+
+        return out