leetcode-1529. 灯泡开关 IV

原始思路

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
class Solution {
    public int minFlips(String target) {
        int count = 0;
        int n = target.length();
        char[] chars = new char[n];
        Arrays.fill(chars,'0');
        for (int i = 0; i < n; i++) {
            char ch = chars[i];
            if ((count & 1) == 1) {
                if (ch == '0'){
                    ch = '1';
                }else {
                    ch = '0';
                }
            }

            if (ch != target.charAt(i)) {
                // 需要反转
                count++;
            }
        }
        return count;
    }
}