Excel Sheet Column Number

Author: anantkaushik

Dropbox/Problem#212.py renamed to Dropbox/Problem#212#719.py

@@ -3,9 +3,7 @@
 Given a column number, return its alphabetical column id. For example, given 1, return "A". Given 27, return "AA".
 """
 def convertToTitle(n):
-    col = []
-    while n:
-        n = n-1
-        col.append(chr((n%26)+65))
-        n=n//26
-    return "".join(col[::-1])
+    column_number = 0
+    for i in range(len(s)):
+        column_number += ((ord(s[-1-i]) - 64) * (26**i))
+    return column_number