use std::io::Write;
use std::collections::*;

type Map<K, V> = BTreeMap<K, V>;
type Set<T> = BTreeSet<T>;
type Deque<T> = VecDeque<T>;

fn main() {
    input! {
        n: usize,
        x: usize,
        y: usize,
        a: [i32; n],
    }
    let mut sum = a.clone();
    sum.push(0);
    for i in (0..n).rev() {
        sum[i] += sum[i + 1];
    }
    let inf = 10000i32;
    let mut dp = vec![vec![inf; n + 1]; n + 1];
    for i in 0..n {
        dp[i][i + 1] = 0;
    }
    for l in (0..n).rev() {
        let mut ep = vec![vec![inf; n + 1]; n + 1];
        ep[l][0] = 0;
        for r in (l + 1)..(n + 1) {
            for m in l..r {
                if dp[m][r] == inf {
                    continue;
                }
                let val = dp[m][r];
                for k in 1..=n {
                    ep[r][k] = ep[r][k].min(ep[m][k - 1] + val);
                }
            }
            let mut val = inf;
            for j in x..=y {
                val = val.min(ep[r][j]);
            }
            if l + 1 < r && val < inf {
                dp[l][r] = val + sum[l] - sum[r];
                ep[r][1] = ep[r][1].min(dp[l][r]);
            }
        }
    }
    let mut ans = dp[0][n];
    if ans >= inf {
        ans = 0;
    }
    println!("{}", ans);
}

// ---------- begin input macro ----------
// reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
#[macro_export]
macro_rules! input {
    (source = $s:expr, $($r:tt)*) => {
        let mut iter = $s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
    ($($r:tt)*) => {
        let s = {
            use std::io::Read;
            let mut s = String::new();
            std::io::stdin().read_to_string(&mut s).unwrap();
            s
        };
        let mut iter = s.split_whitespace();
        input_inner!{iter, $($r)*}
    };
}

#[macro_export]
macro_rules! input_inner {
    ($iter:expr) => {};
    ($iter:expr, ) => {};
    ($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
        let $var = read_value!($iter, $t);
        input_inner!{$iter $($r)*}
    };
}

#[macro_export]
macro_rules! read_value {
    ($iter:expr, ( $($t:tt),* )) => {
        ( $(read_value!($iter, $t)),* )
    };
    ($iter:expr, [ $t:tt ; $len:expr ]) => {
        (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
    };
    ($iter:expr, chars) => {
        read_value!($iter, String).chars().collect::<Vec<char>>()
    };
    ($iter:expr, bytes) => {
        read_value!($iter, String).bytes().collect::<Vec<u8>>()
    };
    ($iter:expr, usize1) => {
        read_value!($iter, usize) - 1
    };
    ($iter:expr, $t:ty) => {
        $iter.next().unwrap().parse::<$t>().expect("Parse error")
    };
}
// ---------- end input macro ----------