LeetCode 2315. Statistical asterisk (string)

1. subject

Give you a string s , Every time Two Continuous vertical line '|' by a pair .
In other words , The first and the second '|' It's a couple , The third and the fourth '|' It's a couple , And so on .

Please return be not in Between vertical line pairs ,s in '*' Number of .

Be careful , Each vertical line '|' Metropolis just Belong to a pair .

 Example  1：
 Input ：s = "l|*e*et|c**o|*de|"
 Output ：2
 explain ： Characters not between vertical line pairs are bold and italicized , Get a string ："l|*e*et|c**o|*de|" .
 The first and second vertical lines  '|'  Characters between are not included in the answer .
 meanwhile , The third and fourth vertical lines  '|'  Characters between are not included in the answer .
 There is a total of... Between vertical line pairs  2  asterisk , So we go back to  2 .

 Example  2：
 Input ：s = "iamprogrammer"
 Output ：0
 explain ： In this case ,s  There is no asterisk in . So back  0 .

 Example  3：
 Input ：s = "yo|uar|e**|b|e***au|tifu|l"
 Output ：5
 explain ： Characters to be considered are bold and italicized ："yo|uar|e**|b|e***au|tifu|l" . There is a total of... Between vertical line pairs  5  asterisk . So we go back to  5 .
 
 Tips ：
1 <= s.length <= 1000
s  Only lowercase letters , A vertical bar  '|'  And asterisk  '*' .
s  contain   even numbers   Vertical lines  '|' .

source ： Power button （LeetCode） link ：https://leetcode.cn/problems/count-asterisks
Copyright belongs to the network . For commercial reprint, please contact the official authority , Non-commercial reprint please indicate the source .

2. Problem solving

• according to | Cut open , Take out index It's even Substring statistics

class Solution:
    def countAsterisks(self, s: str) -> int:
        w = s.split('|')
        ans = 0
        for i in range(0, len(w), 2):
            ans += w[i].count('*')
        return ans

28 ms 14.9 MB Python3

my CSDN Blog address https://michael.blog.csdn.net/

Long click or sweep code pay attention to my official account （Michael amin ）, Come on together 、 Learn together ！