lc-2222

 public long numberOfWays(String s) {
        char[] array = s.toCharArray();
        int n = array.length;
        long[][][] dp = new long[2][4][2];
        for (int i = 0; i < 2; i++) {
            dp[i][0][1] = 1;
            dp[i][0][0] = 1;
        }
        int base = 0;
        dp[base][1][array[0] - '0'] = 1;
        for (int i = 1; i < n; i++) {
            base ^= 1;
            for (int j = 1; j < 4; j++) {
                dp[base][j][0] = dp[base ^ 1][j][0];
                dp[base][j][1] = dp[base ^ 1][j][1];
                dp[base][j][array[i] - '0'] += dp[base ^ 1][j - 1][(array[i] - '0') ^ 1];
            }
        }
        return dp[base][3][0] + dp[base][3][1];
    }