MOD = 998244353

def comb(n,k):
    if n < k or n < 0 or k < 0:
        return 0
    
    nCk = 1
    for i in range(n-k+1, n+1):
        nCk *= i
        nCk %= MOD
    
    for i in range(1,k+1):
        nCk *= pow(i,MOD-2,MOD)
        nCk %= MOD

    return nCk

H,W,M = map(int,input().split())
print(comb(H+W-2,H-1)*comb(H+W-1+M-(H+W-1),H+W-1)*pow(M,H*W-(H+W-1),MOD)%MOD)