Buggy python submission (verdict: Runtime Error):
from sys import stdin

n = int(stdin.readline().rstrip())
v = [int(i) for i in stdin.readline().rstrip().split()]

left = [0] * 10**5 + 1
right = [0] * 10**5 + 1

for i in range(len(v)):
    if i % 2 == 0:
        left[v[i]] += 1
    else:
        right[v[i]] += 1

left_max = 0
left_max_second = 0
right_max = 0
right_max_second = 0
left_flag = 0
right_flag = 0
for i in range(len(left)):
    if left_max < left[i]:
        left_max_second = left_max
        left_max = left[i]
        left_flag = i

    if right_max < right[i]:
        right_max_second = right_max
        right_max = right[i]
        right_flag = i

if left_flag == right_flag:
    tmp = min(left_max + right_max_second, right_max + left_max_second)
    # print(left_max, left_max_second, right_max, right_max_second)
    print(n - tmp)
else:
    print((n // 2 - left_max) + (n // 2 - right_max))


Fixed submission:
from collections import Counter
from sys import stdin

n = int(stdin.readline().rstrip())
a = [int(i) for i in stdin.readline().rstrip().split()]

even = []
odd = []
for i in range(n):
    if i % 2 == 0:
        even.append(a[i])
    else:
        odd.append(a[i])

even_conter = Counter(even)
odd_conter = Counter(odd)

even_sorted = even_conter.most_common()
odd_sorted = odd_conter.most_common()

even_key1 = even_sorted[0][0]
even_val1 = even_sorted[0][1]
odd_key1 = odd_sorted[0][0]
odd_val1 = odd_sorted[0][1]

ans = n
if even_key1 == odd_key1:
    if len(even_sorted) >= 2:
        even_val2 = even_sorted[1][1]
        odd_val2 = odd_sorted[1][1]
        ans -= max((even_val1 + odd_val2), (odd_val1 + even_val2))
    else:
        ans -= max(even_val1, odd_val1)
else:
    ans -= (even_val1 + odd_val1)

print(ans)

Buggy python submission (verdict: Runtime Error):
from sys import stdin

n = int(stdin.readline().rstrip())
v = [int(i) for i in stdin.readline().rstrip().split()]

left = [0] * 10**5
right = [0] * 10**5

for i in range(len(v)):
    if i % 2 == 0:
        left[v[i]] += 1
    else:
        right[v[i]] += 1

left_max = 0
left_max_second = 0
right_max = 0
right_max_second = 0
left_flag = 0
right_flag = 0
for i in range(len(left)):
    if left_max < left[i]:
        left_max_second = left_max
        left_max = left[i]
        left_flag = i

    if right_max < right[i]:
        right_max_second = right_max
        right_max = right[i]
        right_flag = i

if left_flag == right_flag:
    tmp = min(left_max + right_max_second, right_max + left_max_second)
    # print(left_max, left_max_second, right_max, right_max_second)
    print(n - tmp)
else:
    print((n // 2 - left_max) + (n // 2 - right_max))


Fixed submission:
from collections import Counter
from sys import stdin

n = int(stdin.readline().rstrip())
a = [int(i) for i in stdin.readline().rstrip().split()]

even = []
odd = []
for i in range(n):
    if i % 2 == 0:
        even.append(a[i])
    else:
        odd.append(a[i])

even_conter = Counter(even)
odd_conter = Counter(odd)

even_sorted = even_conter.most_common()
odd_sorted = odd_conter.most_common()

even_key1 = even_sorted[0][0]
even_val1 = even_sorted[0][1]
odd_key1 = odd_sorted[0][0]
odd_val1 = odd_sorted[0][1]

ans = n
if even_key1 == odd_key1:
    if len(even_sorted) >= 2:
        even_val2 = even_sorted[1][1]
        odd_val2 = odd_sorted[1][1]
        ans -= max((even_val1 + odd_val2), (odd_val1 + even_val2))
    else:
        ans -= max(even_val1, odd_val1)
else:
    ans -= (even_val1 + odd_val1)

print(ans)