import sys
input = sys.stdin.readline

mod=998244353

FACT=[1]
for i in range(1,2*10**6+1):
    FACT.append(FACT[-1]*i%mod)

FACT_INV=[pow(FACT[-1],mod-2,mod)]
for i in range(2*10**6,0,-1):
    FACT_INV.append(FACT_INV[-1]*i%mod)

FACT_INV.reverse()

def Combi(a,b):
    if 0<=b<=a:
        return FACT[a]*FACT_INV[b]%mod*FACT_INV[a-b]%mod
    else:
        return 0

def Combi2(a,b):# aは大きいが、bは小さいとき
    if b>a or b<0:
        return 0
    ANS=1
    for i in range(min(b,a-b)):
        ANS=ANS*(a-i)%mod
 
    for i in range(min(b,a-b)):
        ANS=ANS*pow(min(b,a-b)-i,mod-2,mod)
 
    return ANS


H,W,M=map(int,input().split())

print(Combi(H+W-2,W-1)*Combi2(M,H+W-1)*pow(M,H*W-H-W+1,mod)%mod)