use proconio::input;

fn main() {
    input! {
        n: usize,
        k: u32,
        a: [u64; n],
        c: [u32; n],
    }
    let mut dp = vec![vec![0u64; n]; n];
    for (i, &c) in c.iter().enumerate() {
        dp[(i + 1) % n][i] = 1 << c;
    }
    for d in 2..=n {
        for e in 1..d {
            for l in 0..n {
                let c = (l + e) % n;
                let r = (l + d) % n;
                let x = dp[c][l];
                let y = dp[r][c];
                dp[r][l] |= (x | y) & widen(x, k) & widen(y, k);
            }
        }
    }
    let mut ans = 0;
    for l in 0..n {
        let mut sum = a[l];
        for r in (l + 1..n).chain(0..l) {
            if dp[r][l] != 0 {
                ans = ans.max(sum);
            }
            sum += a[r];
        }
        if dp[l][l] != 0 {
            ans = ans.max(sum);
        }
    }
    println!("{ans}");
}

fn widen(mut x: u64, k: u32) -> u64 {
    match k {
        0 => x,
        1 => x | x << 1 | x >> 1,
        2 => {
            x <<= 1;
            x <<= 2;
            x <<= 2;
            x >> 2
        }
        3 => {
            x <<= 1;
            x <<= 2;
            x <<= 4;
            x >> 3
        }
        4 => {
            x <<= 1;
            x <<= 2;
            x <<= 4;
            x <<= 2;
            x >> 4
        }
        5 => {
            x <<= 1;
            x <<= 2;
            x <<= 4;
            x <<= 4;
            x >> 4
        }
        _ => unreachable!(),
    }
}