Järjestys

input()
x = list(map(int, input().split()))
r = ""
length = 0


def turn(i):
    global length
    if i <= 1:
        return ""
    else:
        length += 1
        return str(i) + " "
trues = [False] * len(x)
index = 1
lastCorrect = 0
firstOfCycle = 1
while index <= len(x):
    if x[index-1] < index:
        #ei toimi (välttämättä)
        r += (turn(index-1+firstOfCycle)+turn(index-2+firstOfCycle-(x[index-1]-2))+turn(index-2+firstOfCycle-(x[index-1]-2)-1)+turn(index-1+firstOfCycle))
        index = x[index-1]
    else:
        #toimii
        r += (turn(index-1+firstOfCycle)+turn(x[index-1])+turn(x[index-1]-1)+turn(index-2+firstOfCycle))
        index = x[index-1]
    firstOfCycle = 0
    trues[index - 1] = True
    if index == lastCorrect + 1:
        try:
            while trues[index - 1]:
                index += 1
                lastCorrect += 1
        except Exception as e:
            index += 1
        firstOfCycle = 1






r = r[:-1]
print(length)
print(r)

Test 1

Group: 1

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED

Test 3

Group: 3

Verdict: ACCEPTED