use proconio::input;

fn main() {
    input! {
        n: usize,
        d: usize,
        k: usize,
        a: [isize; n],
        c: [usize; n],
    }

    let mut dp1 = vec![vec![isize::MIN; k + 1]; d + 1];
    let mut dp2 = vec![vec![isize::MIN; k + 1]; d + 1];
    dp1[0][0] = 0;
    dp1[1][c[0].min(k)] = a[0];

    for i in 1..n {
        for j in 0..d {
            for l in 0..k + 1 {
                if dp1[j][l] == isize::MIN {
                    continue;
                }

                dp2[j][l] = dp2[j][l].max(dp1[j][l]);
                dp2[j + 1][(l + c[i]).min(k)] = dp2[j + 1][(l + c[i]).min(k)].max(dp1[j][l] + a[i]);
            }
        }

        dp1 = dp2.clone();
        dp2 = vec![vec![isize::MIN; k + 1]; d + 1];
    }

    if dp1[d][k] == isize::MIN {
        println!("No");
    } else {
        println!("{}", dp1[d][k]);
    }
}