题解 | #打印极值点下标#

def point_ex(s):
    k=0
    arr=[]
    if s[0]!=s[1]:
        arr.append(0)
    if s[-1]!=s[-2]:
        arr.append(len(s)-1)
    for i in s[1:len(s)-1]:
        
        if s[k]<i and s[k+2]<i or s[k]>i and s[k+2]>i:
            arr.append(k+1)
        k = k+1
        p = sorted(arr)
        #u = "".join(p)
    for i in p:
        print(i,end=' ')
    print()
            
        


while True:
    try:
        n = int(input())
        s = list(map(int, input().split()))
        point_ex(s)
    except:
        break