Length of Last Word
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Given a string s consists of upper/lower-case alphabets and empty space characters ' ', return the length of last word in the string.
If the last word does not exist, return 0.
Note: A word is defined as a character sequence consists of non-space characters only.
For example,
Given s = "Hello World",
return 5.
题意：返回一个句子的最后一个单词的长度
思路：将字符串分割成单词，然后返回最后一个的长度即可
python代码
class Solution:
# @param s, a string
# @return an integer
def lengthOfLastWord(self, s):
s_split = s.split()
return 0 if len(s_split) == 0 else len(s_split[-1])
c++代码
int lengthOfLastWord(const char *s){
const string str(s);
auto a = find_if(str.rbegin(), str.rend(), ::isalpha);
auto b = find_if_not(a, str.rend(), ::isalpha);
return distance(a, b);
}