LeetCode:Length of Last Word

Posted 2020-07-10 walker lee

Length of Last Word

Total Accepted: 94220 Total Submissions: 319858 Difficulty: Easy

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.

Subscribe to see which companies asked this question

Hide Tags

 String

c++ code:

class Solution {
public:
    int lengthOfLastWord(string s) {
        int tail = s.size() - 1;
        int cnt=0;
        
        while(tail>=0 && ' ' == s[tail]) tail--;
        while(tail>=0 && s[tail]!=' ') {
            cnt++;
            tail--;
        }
        return cnt;
    }
};