Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())

arr = list(map(int, input().split()))

res = {}
start = None

if n == 1:
    if k % 2:
        print(*arr)
    else:
        print(*[])
    exit()

for i in range(1, k + 1):
    if not start:
        response = []
        for elem in arr:
            if elem not in response:
                response.append(elem)
            else:
                idx = response.index(elem)
                response = response[:idx]
        if not response:
            print(*response)
            exit()
        start = response[0]
        res[i] = 0
        continue

    idx = -1
    while start in arr[idx + 1:]:
        idx += arr[idx+1:].index(start) + 2
        if idx < len(arr):
            start = arr[idx]
        else:
            break

    res[i] = idx
    if idx == len(arr):
        k %= len(res)
        if not k:
            k = len(res)
        break

answer = res[k]
response = []
for elem in arr[answer:]:
    if elem not in response:
        response.append(elem)
    else:
        idx = response.index(elem)
        response = response[:idx]
print(*response)


Fixed submission:
n, k = map(int, input().split())
arr = list(map(int, input().split()))

if n == 1:
    if k % 2:
        print(*arr)
    else:
        print(*[])
    exit()

table = {}
original_table = {}
move = {}

for i, a in enumerate(arr):
    if a not in table:
        table[a] = i
        original_table[a] = i
    else:
        move[table[a]], move[i] = i + 1, original_table[a] + 1
        table[a] = i

res = {}
idx = 0

for i in range(1, k + 1):
    while idx in move and move[idx] > idx:
        idx = move[idx]

    res[i] = idx
    if idx == len(arr):
        k %= len(res)
        if not k:
            k = len(res)
        break

    if idx in move:
        idx = move[idx]
    else:
        idx += 1

idx = res[k]
response = []

while idx < len(arr):
    while idx in move and move[idx] > idx:
        idx = move[idx]
    if idx < len(arr):
        response.append(arr[idx])
    idx += 1

print(*response)

Buggy python submission (verdict: Time Limit Exceeded):
n, k = map(int, input().split())

arr = list(map(int, input().split()))

res = {}
s = []

for i in range(1, k + 1):
    for ele in arr:
        if ele not in s:
            s.append(ele)
        else:
            idx = s.index(ele)
            s = s[:idx]
    res[i] = s[:]
    if not s:
        k %= len(res)
        if not k:
            k = len(res)
        answer = res[k]
        print(*answer)
        break
else:
    answer = res[k]
    print(*answer)



Fixed submission:
n, k = map(int, input().split())
arr = list(map(int, input().split()))

if n == 1:
    if k % 2:
        print(*arr)
    else:
        print(*[])
    exit()

table = {}
original_table = {}
move = {}

for i, a in enumerate(arr):
    if a not in table:
        table[a] = i
        original_table[a] = i
    else:
        move[table[a]], move[i] = i + 1, original_table[a] + 1
        table[a] = i

res = {}
idx = 0

for i in range(1, k + 1):
    while idx in move and move[idx] > idx:
        idx = move[idx]

    res[i] = idx
    if idx == len(arr):
        k %= len(res)
        if not k:
            k = len(res)
        break

    if idx in move:
        idx = move[idx]
    else:
        idx += 1

idx = res[k]
response = []

while idx < len(arr):
    while idx in move and move[idx] > idx:
        idx = move[idx]
    if idx < len(arr):
        response.append(arr[idx])
    idx += 1

print(*response)