Project Euler Problem 022

http://projecteuler.net/index.php?section=problems&id=22

Using names.txt (right click and 'Save Link/Target As...'),
 a 46K text file containing over five-thousand first names, begin by sorting it into alphabetical order.
Then working out the alphabetical value for each name,
 multiply this value by its alphabetical position in the list to obtain a name score.
For example, when the list is sorted into alphabetical order, COLIN,
which is worth 3 + 15 + 12 + 9 + 14 = 53, is the 938th name in the list.
So, COLIN would obtain a score of 938  53 = 49714.
What is the total of all the name scores in the file?

テキストファイルを読んで問題の通りに計算する。
書いてあることをそのままコードにした。文字をアスキーコードにするのには ord 関数を使う。他言語だと asc とかですね。

import datetime

def func(s):
    return sum(ord(x)-64 for x in s)

def euler022():
    names = [ x[1:-1] for x in open('names.txt').read().split(',') ]
    names.sort()
    
    result = 0
    for i, name in enumerate(names):
        result += (i+1) * func(name)
    print result



begin = datetime.datetime.now()
euler022()
end   = datetime.datetime.now()
print end - begin

答え: 871198282
実行時間: 0.021660秒くらい