mod=998244353

M=10**5*5
fac=[1]*M
ninv=[1]*M
finv=[1]*M
for i in range(2,M):
  fac[i]=fac[i-1]*i%mod
  ninv[i]=(-(mod//i)*ninv[mod%i])%mod
  finv[i]=finv[i-1]*ninv[i]%mod

n,k,x=map(int,input().split())
ans=(fac[n-k]-1)*ninv[2]%mod

for i in range(1,k):
  tmp=fac[n-i+1]*(n-i)%mod*ninv[2]
  tmp-=fac[n-i]*(x-1)
  tmp+=(x-1)*fac[n-i]%mod*(i-1)%mod*fac[n-2]%mod*finv[n-1]
  ans+=tmp%mod*fac[n-i-1]%mod*finv[n-i]
  ans%=mod

ans+=fac[n-k]*(x-1)
ans%=mod

ans-=(x-1)*fac[n-k]%mod*(k-1)%mod*fac[n-2]%mod*finv[n-1]%mod
print(ans*fac[n-1]%mod)