n = int(input())
V = list(map(int, input().split()))
if n == 1:
    print(V[0])
    print(1)
    exit()
dp = [0] * n
dp[0] = V[0]
dp[1] = V[1]
bef = [-1] * n
for i in range(2, n):
    dp[i] = dp[i - 2] + V[i]
    bef[i] = i - 2
    if i >= 3 and dp[i - 3] + V[i] > dp[i]:
        dp[i] = dp[i - 3] + V[i]
        bef[i] = i - 3

if dp[n - 1] > dp[n - 2]:
    print(dp[n - 1])
    x = n - 1
else:
    print(dp[n - 2])
    x = n - 2
    
ans = []
while x != -1:
    ans.append(x + 1)
    x = bef[x]
print(*ans[::-1])