import sys
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

n, m, k = mi()

ans = m


if k >= 10 ** 7:
    raise Exception
for k in range(2, k + 1):
    x = pow(k, 2 * n, mod) - 2 * pow(k - 1, 2 * n, mod) + pow(k - 2, 2 * n, mod)
    x %= mod

    x *= (m - k + 1)
    x %=mod
    ans += x
    ans %= mod


print(ans)