LeetCode - 551. Student Attendance Record I
You are given a string representing an attendance record for a student. The record only contains the following three characters:
- 'A' : Absent.
- 'L' : Late.
- 'P' : Present.
A student could be rewarded if his attendance record doesn't contain more than one 'A' (absent) or more than two continuous 'L' (late).
You need to return whether the student could be rewarded according to his attendance record.
Example 1:
Input: "PPALLP" Output: True
Example 2:
Input: "PPALLL" Output: False
class Solution { public boolean checkRecord(String s) { if (s == null) return true; int a = 0, l = 1; for (int i=0; i<s.length();) { char ch = s.charAt(i); if (ch == 'A') a ++; if (a > 1) return false; if (ch == 'L') { while (i < s.length()-1 && s.charAt(++i) == 'L') l ++; if (l > 2) return false; l = 1; if (i < s.length()-1) i--; } i ++; } return true; } }
作者:Pickle
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致读者:坚持写博客不容易,写高质量博客更难,我也在不断的学习和进步,希望和所有同路人一道用技术来改变生活。觉得有点用就点个赞哈。
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