Student Attendance Record I
给一个string, 问有没有连续三个L或者超过一个A. 超过一个A用boolean判断, 连续三个L用一个counter和prev, prev记录前一个字符, counter记录几次重复.
class Solution {
public boolean checkRecord(String s) {
boolean absent = false;
int countOfL = 0;
char prev = 'C';
for(char c : s.toCharArray()) {
if(c == 'A') {
if(!absent)
absent = true;
else
return false;
}
else if(c == 'L' && prev == 'L'){
countOfL++;
if(countOfL == 2)
return false;
}else{
countOfL = 0;
}
prev = c;
}
return true;
}
}