Length Of Last words
Given a string s consisting of words and spaces, return the length of the last word in the string.
A word is a maximal substring consisting of non-space characters only.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Example 1:
Input: s = "Hello World"
Output: 5
Explanation: The last word is "World" with length 5.
Example 2:
Input: s = " fly me to the moon "
Output: 4
Explanation: The last word is "moon" with length 4.
Example 3:
Input: s = "luffy is still joyboy"
Output: 6
Explanation: The last word is "joyboy" with length 6.
C++ Solution
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
int lengthOfLastWord(string s) {
auto riter = s.rbegin();
while (riter != s.rend()) {
if (isspace(*riter)) {
riter++;
continue;
} else {
break;
}
}
int length = 0;
while (riter != s.rend()) {
if (!isspace(*riter)) {
length++;
riter++;
} else {
break;
}
}
return length;
}
