leetcode

leetcode/171.py

@@ -0,0 +1,11 @@
+class Solution:
+    def titleToNumber(self, columnTitle: str) -> int:
+        dnum={}
+        for i in range(26):
+            dnum[chr(ord('A')+i)]=i+1
+
+        result=0
+        for i in range(1,len(columnTitle)+1):
+            c=columnTitle[-i]
+            result+=dnum[c]*(26**(i-1))
+        return result