mod = 998244353
def matrix_prod(A,B):
  l,m,n = len(A),len(B),len(B[0])
  C = [[0 for _ in range(n)] for _ in range(l)]
  for i in range(l):
    for j in range(m):
      a = A[i][j]
      for k in range(n):
        C[i][k] = (C[i][k] + a * B[j][k] % mod) % mod
  return C

def matrix_pow(A,n):
  N = len(A)
  if n % 2:
    return matrix_prod(A,matrix_pow(A,n-1))
  elif n > 0:
    B = matrix_pow(A,n//2)
    return matrix_prod(B,B)
  else:
    res = [[int(i==j) for j in range(N)] for i in range(N)]
    return res

N,M,K = map(int,input().split())
C = [0 for _ in range(M + 1)]
for i in range(1,M + 1):
  C[M // i] += 1
X = set()
for i in range(1,M + 1):
  X.add(M // i)
X = list(X)
X.sort()
n = len(X)
A = [[0 for _ in range(n)] for _ in range(n)]
for i in range(n):
  for j in range(n):
    if abs(X[i] - X[j]) <= K:
      A[i][j] = C[X[i]]

dp = [[C[X[i]]] for i in range(n)]
dp = matrix_prod(matrix_pow(A,N - 1),dp)
ans = 0
for i in range(n):
  ans += dp[i][0]
print(ans % mod)