#![allow(non_snake_case)]

use proconio::input;

const INF: i64 = 1_000_000_000_000_000_000;

fn main() {
    input! {
        N: usize, D: usize, K: usize,
        A: [i64; N],
        C: [usize; N],
    }

    let mut dp = vec![vec![-INF * 2; K + 1]; D + 1];
    dp[0][0] = 0;

    for i in 0 .. N {
        for count in (0 .. D).rev() {
            for beauty in (0 ..= K).rev() {
                let count_next = count + 1;
                let beauty_next = K.min(beauty + C[i]);
                let sat = dp[count_next][beauty_next].max(dp[count][beauty] + A[i]);
                dp[count_next][beauty_next] = sat;
            }
        }
    }

    if dp[D][K] >= -INF {
        println!("{}", dp[D][K]);
    } else {
        println!("No");
    }
}