N = int(input())
A = list(map(int, input().split()))
mod = 998244353

if N == 1:
    print(A[0])
    exit()

ans = 0
cnt = pow(2, N - 1, mod)
d = pow(2, N - 2, mod)
print(cnt, d)
for a in A:
    ans += a * cnt
    ans %= mod
    cnt += d
    cnt %= mod

print(ans)