import sys
from itertools import permutations
from heapq import heappop,heappush
from collections import deque
import random
import bisect

input = lambda :sys.stdin.readline().rstrip()
mi = lambda :map(int,input().split())
li = lambda :list(mi())

def cmb(n, r, mod):
    if ( r<0 or r>n ):
        return 0
    return (g1[n] * g2[r] % mod) * g2[n-r] % mod


mod = 998244353
N = 10**6 + 100
g1 = [1]*(N+1)
g2 = [1]*(N+1)
inverse = [1]*(N+1)

for i in range( 2, N + 1 ):
    g1[i]=( ( g1[i-1] * i ) % mod )
    inverse[i]=( ( -inverse[mod % i] * (mod//i) ) % mod )
    g2[i]=( (g2[i-1] * inverse[i]) % mod )
inverse[0]=0

from math import gcd

H,W,K = mi()

K = H*W - K

if K == 0:
    exit(print(1))

res = 0
for i in range(H):
    if (K-W*i) % (H-i) == 0:
        j = (K-W*i)//(H-i)
        res += cmb(H,i,mod) * cmb(W,j,mod) % mod
        res %= mod

print(res)