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.
1 class Solution { 2 public: 3 int lengthOfLastWord(const char *s) { 4 int res = 0; 5 int length = strlen(s); 6 for(int i = length-1; i >= 0; i--) { 7 if(s[i] != ' ') 8 res++; 9 else if(res > 0) 10 break; 11 } 12 return res; 13 } 14 };