Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()
vlen = len(V)
while True:
    if vodd[0][0] != veven[0][0]:
        print(vlen - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(vlen - vodd[1][1] - veven[0][1],
                    vlen - vodd[0][1] - veven[1][1]))

Fixed submission:
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()
vlen = len(V)
while True:
    if vodd[0][0] != veven[0][0]:
        print(vlen - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(vlen - vodd[1][1] - veven[0][1],
                    vlen - vodd[0][1] - veven[1][1]))
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()

while True:
    if vodd[0][0] != veven[0][0]:
        print(len(V) - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(len(V) - vodd[1][1] - veven[0][1],
                    len(V) - vodd[0][1] - veven[1][1]))

Fixed submission:
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()
vlen = len(V)
while True:
    if vodd[0][0] != veven[0][0]:
        print(vlen - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(vlen - vodd[1][1] - veven[0][1],
                    vlen - vodd[0][1] - veven[1][1]))
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

while True:
    if V_odd_counter.most_common()[0][0] != V_even_counter.most_common()[0][0]:
        print(len(V) - V_odd_counter.most_common()[0][1] - V_even_counter.most_common()[0][1])
        exit()
    else:
        print(min(len(V) - V_odd_counter.most_common()[1][1] - V_even_counter.most_common()[0][1],
                    len(V) - V_odd_counter.most_common()[0][1] - V_even_counter.most_common()[1][1]))

Fixed submission:
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()
vlen = len(V)
while True:
    if vodd[0][0] != veven[0][0]:
        print(vlen - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(vlen - vodd[1][1] - veven[0][1],
                    vlen - vodd[0][1] - veven[1][1]))
        exit()

Buggy python submission (verdict: Time Limit Exceeded):
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)
while True:
    if V_odd_counter.most_common()[0][0] != V_even_counter.most_common()[0][0]:
        print(len(V) - V_odd_counter.most_common()[0][1] - V_even_counter.most_common()[0][1])
        exit()
    else:
        if V_odd_counter.most_common()[0][1] >= V_even_counter.most_common()[0][1]:
            V_even = [i for i in V_even if i != V_even_counter.most_common()[0][0] ]
            V_even_counter = Counter(V_even)
        else:
            V_odd = [i for i in V_odd if i != V_odd_counter.most_common()[0][0] ]
            V_odd_counter = Counter(V_odd)


Fixed submission:
from collections import Counter

N = int(input())
V = list(map(int, input().split()))

if len(set(V)) == 1:
    print(len(V)//2)
    exit()

V_odd = [i for i in V[::2]]
V_even = [i for i in V[1::2]]
V_odd_counter = Counter(V_odd)
V_even_counter = Counter(V_even)

vodd = V_odd_counter.most_common()
veven = V_even_counter.most_common()
vlen = len(V)
while True:
    if vodd[0][0] != veven[0][0]:
        print(vlen - vodd[0][1] - veven[0][1])
        exit()
    else:
        print(min(vlen - vodd[1][1] - veven[0][1],
                    vlen - vodd[0][1] - veven[1][1]))
        exit()