n = int(input())
V = list(map(int, input().split()))

DP = [0 for _ in range(n + 2)]
for i in range(n):
    v = V[i]
    DP[i + 2] = max(DP[i + 2], DP[i] + v)
    DP[i + 1] = max(DP[i + 1], DP[i])
ANS = []
if DP[n] >= DP[n + 1]:
    print(DP[n])
    cp = n
    while cp > 0:
        if DP[cp - 1] == DP[cp]:
            cp -= 1
        else:
            cp -= 2
            ANS.append(cp + 1)
else:
    print(DP[n + 1])
    ANS.append(n)
    cp = n - 1
    while cp > 0:
        if DP[cp - 1] == DP[cp]:
            cp -= 1
        else:
            cp -= 2
            ANS.append(cp + 1)
ANS.reverse()
print(*ANS)