#![allow(unused_imports)]

fn main() {
    input! {
        n: u64, m: usize, k: usize,
    }
    let mut cnt = vec![0; m + 1];
    for i in 1..=m {
        cnt[m / i] += 1;
    }
    let mut nonzero = vec![];
    for (i, c) in cnt.into_iter().enumerate() {
        if c != 0 {
            nonzero.push((i, c));
        }
    }
    let l = nonzero.len();
    let mut mat = mvec![0; (l, l)];
    for (i, &(d, c)) in nonzero.iter().enumerate() {
        for (j, &(dd, _)) in nonzero.iter().enumerate() {
            if d.abs_diff(dd) <= k {
                mat[i][j] += c;
            }
        }
    }
    mat = mat_pow(mat, n - 1);
    let mut ans = 0;
    for i in 0..l {
        for j in 0..l {
            ans += mat[i][j] * nonzero[j].1;
            ans %= MOD;
        }
    }
    println!("{ans}");
}

fn mat_prod(a: &[Vec<u64>], b: &[Vec<u64>]) -> Vec<Vec<u64>> {
    let n = a.len();
    let mut c = mvec![0; (n, n)];
    for i in 0..n {
        for k in 0..n {
            for j in 0..n {
                c[i][j] += a[i][k] * b[k][j];
                c[i][j] %= MOD;
            }
        }
    }
    c
}

fn mat_pow(mut a: Vec<Vec<u64>>, mut p: u64) -> Vec<Vec<u64>> {
    let n = a.len();
    let mut r = mvec![0; (n, n)];
    for i in 0..n {
        r[i][i] += 1;
    }
    while p > 0 {
        if p & 1 == 1 {
            r = mat_prod(&r, &a);
        }
        a = mat_prod(&a, &a);
        p >>= 1;
    }
    r
}

const MOD: u64 = 998244353;

/*
dp[i+1][a] = cnt[a] * (dp[i][a-38] + .. + dp[i][a+38])
non zero value => O(sqrt m)

2 3 1
[0, 2, 0, 1]
[0, 4, 0, 1]
*/

use proconio::{input, marker::*};
use std::{cmp::Reverse, collections::*};

#[macro_export]
macro_rules! chmax {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a < tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
macro_rules! chmin {
    ($a:expr, $b:expr) => {{
        let tmp = $b;
        if $a > tmp {
            $a = tmp;
            true
        } else {
            false
        }
    }};
}

#[macro_export]
/// mvec![]
macro_rules! mvec {
    ($val:expr; ()) => {
        $val
    };
    ($val:expr; ($size:expr $(,$rest:expr)*)) => {
        vec![mvec![$val; ($($rest),*)]; $size]
    };
}