mod=998244353 def cmb(n,r): if r<0 or r>n: return 0 return ((g1[n]*g2[r]%mod)*g2[n-r])%mod N=300000 g1=[1]*(N+3) for i in range(2,N+3): g1[i]=g1[i-1]*i%mod g2=[0]*len(g1) g2[-1]=pow(g1[-1],mod-2,mod) for i in range(N+1,-1,-1): g2[i]=g2[i+1]*(i+1)%mod inv=[0]*(N+3) for i in range(1,N+3): inv[i]=g2[i]*g1[i-1]%mod N=int(input()) A=list(map(int,input().split())) mod=998244353 MOD=999630629 S=sum(A) if SK: break v[p]=(v[p]+cmb(C[i],j))%mod X=FPS().convolution(X,v)[:K+1] print((pow(2,N-1,mod)*S-sum(X))%mod)