import sys

int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def SI(): return sys.stdin.readline()[:-1]
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]

def main():
    n=II()
    dp=[0]*(n+1)
    log=[[] for _ in range(n+1)]
    vv=LI()
    for i,v in enumerate(vv):
        if i==0:
            dp[1]=+v
            log[1]=[i+1]
        elif i==1:
            dp[2]=+v
            log[2]=[i+1]
        elif dp[i-2]>dp[i-1]:
            dp[i+1]=dp[i-2]+v
            log[i+1]=log[i-2]+[i+1]
        else:
            dp[i+1]=dp[i-1]+v
            log[i+1]=log[i-1]+[i+1]
    if dp[-1]>dp[-2]:
        print(dp[-1])
        print(*log[-1])
    else:
        print(dp[-2])
        print(*log[-2])

main()