Järjestys

import random
import time
input()
x = list(map(int, input().split()))
r = ""
length = 0
"""
def getIndex(l,i):
    c = 0
    w = 0
    while True:
        if l[w] == i:
            return c
        elif l[w] < i:
            c += 1
        w += 1

i = int(len(x))
b = True
while i != 1:
    #index = x.index(i)
    index = getIndex(x,i)
    if index == i - 1:
        pass
    elif index == 0:
        length += 2
        r += (str(i)+" "+str(i-1)+" ")
    else:
        length += 4
        r += (str(index + 1)+" "+str(i)+" "+str(i-1)+" "+str(index)+" ")
    #x.pop(index)
    i -= 1


"""
def turn(i):
    global length
    if i <= 0:
        return ""
    else:
        length += 1
        return str(i) + " "
trues = [False] * len(x)
index = 1
lastCorrect = 0
firstOfCycle = 1
while index <= len(x):
    #x[index] -> x[x[index]]
    if x[index-1] < index:
        r += (turn(index-1+firstOfCycle)+turn(x[index-1])+turn(x[index-1]-1)+turn(index-2+firstOfCycle))
        index = x[index-1]
    else:
        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: WRONG ANSWER

Test 2

Group: 2

Verdict: WRONG ANSWER

Test 3

Group: 3

Verdict: WRONG ANSWER