Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
V = list(map(int,input().split()))
V_odd = V[::2]
V_eve = V[1::2]
odd_max = Counter(V_odd).most_common(1)
even_max = Counter(V_eve).most_common(1)

result = n - odd_max[0][1] - even_max[0][1]
if odd_max[0][0] == even_max[0][0]:
    odd_least,even_least = 0,0
    if Counter(V_odd).most_common(1) != Counter(V_odd).most_common(2):
        odd_least = (Counter(V_odd).most_common(2))[0][1]
    if Counter(V_eve).most_common(1) != Counter(V_eve).most_common(2):
        even_least = (Counter(V_eve).most_common(2))[0][1]
    if Counter(V_odd).most_common(1) == Counter(V_odd).most_common(2) and Counter(V_eve).most_common(1) == Counter(V_eve).most_common(2):
        result = int(n/2)
    else:
        result = min(n - odd_least - even_max,n - even_least - odd_max)


print(result)

Fixed submission:
from collections import Counter
n = int(input())
V = list(map(int,input().split()))
V_odd = V[::2]
V_eve = V[1::2]
odd_max = Counter(V_odd).most_common(1)
even_max = Counter(V_eve).most_common(1)

result = n - odd_max[0][1] - even_max[0][1]
if odd_max[0][0] == even_max[0][0]:
    odd_least,even_least = 0,0
    if Counter(V_odd).most_common(1) != Counter(V_odd).most_common(2):
        odd_least = (Counter(V_odd).most_common(2))[1][1]
    if Counter(V_eve).most_common(1) != Counter(V_eve).most_common(2):
        even_least = (Counter(V_eve).most_common(2))[1][1]
    if Counter(V_odd).most_common(1) == Counter(V_odd).most_common(2) and Counter(V_eve).most_common(1) == Counter(V_eve).most_common(2):
        result = int(n/2)
    else:
        result = min(n - odd_least - even_max[0][1],n - even_least - odd_max[0][1])

print(result)

Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
V = list(map(int,input().split()))
V_odd = V[::2]
v_eve = V[1::2]
odd_max = Counter(V_odd).most_common(1)
even_max = Counter(v_eve).most_common(1)

result = n - odd_max[0][1] - even_max[0][1]
if odd_max[0][0] == even_max[0][0]:
    odd_least,even_least = 0,0
    if Counter(V_odd).most_common(1) != Counter(V_odd).most_common(2):
        odd_least = (Counter(V_odd).most_common(2))[0][1]
    if Counter(v_eve).most_common(1) != Counter(v_eve).most_common(2):
        even_least = (Counter(V_eve).most_common(2))[0][1]
    if Counter(V_odd).most_common(1) == Counter(V_odd).most_common(2) and Counter(v_eve).most_common(1) == Counter(v_eve).most_common(2):
        result = int(n/2)
    else:
        result = min(n - odd_least - even_max,n - even_least - odd_max)


print(result)

Fixed submission:
from collections import Counter
n = int(input())
V = list(map(int,input().split()))
V_odd = V[::2]
V_eve = V[1::2]
odd_max = Counter(V_odd).most_common(1)
even_max = Counter(V_eve).most_common(1)

result = n - odd_max[0][1] - even_max[0][1]
if odd_max[0][0] == even_max[0][0]:
    odd_least,even_least = 0,0
    if Counter(V_odd).most_common(1) != Counter(V_odd).most_common(2):
        odd_least = (Counter(V_odd).most_common(2))[1][1]
    if Counter(V_eve).most_common(1) != Counter(V_eve).most_common(2):
        even_least = (Counter(V_eve).most_common(2))[1][1]
    if Counter(V_odd).most_common(1) == Counter(V_odd).most_common(2) and Counter(V_eve).most_common(1) == Counter(V_eve).most_common(2):
        result = int(n/2)
    else:
        result = min(n - odd_least - even_max[0][1],n - even_least - odd_max[0][1])

print(result)