'''
行列累乗ライブラリ
使用上の注意→ベクトルを入れる場合も二次元配列にする。
'''
def mat_mul(a, b, m) :
    I, J, K = len(a), len(b[0]), len(b)
    c = [[0] * J for _ in range(I)]
    for i in range(I) :
        for j in range(J) :
            for k in range(K) :
                c[i][j] += a[i][k] * b[k][j]
                c[i][j] %= m
    return c


def mat_pow(x, n, m):
    y = [[0] * len(x) for _ in range(len(x))]

    for i in range(len(x)):
        y[i][i] = 1

    while n > 0:
        if n & 1:
            y = mat_mul(x, y, m)
        x = mat_mul(x, x, m)
        n >>= 1

    return y

from collections import defaultdict
N,M,K=map(int,input().split())
p=998244353
dic=defaultdict(int)
for i in range(1,M+1):
    dic[M//i]+=1
memo=list(dic.keys())
A=[[0 for _ in range(len(memo))] for _ in range(len(memo))]
for i in range(len(memo)):
    for j in range(len(memo)):
        if i==j:
            continue
        if abs(memo[i]-memo[j])<=K:
            A[i][j]=dic[memo[j]]
    A[i][i]=dic[memo[i]]
B=mat_pow(A,N-1,p)
#print(dic,memo)
#print(A)
mul=mat_mul([[dic[memo[i]] for i in range(len(memo))]],B,p)
print(sum(mul[0])%p)