【LeetCode】58 - Length of Last Word

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

.

class Solution {
public:
int lengthOfLastWord(string s) {
int n=s.size()-1;
while(n>=0&&s.at(n)&&s.at(n)==' ')n--;
int i=0;

for(;n>=0&&s.at(n)&&s.at(n)!=' ';n--,i++);
return i;
}
};