Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
v = list(map(int, input().split()))
i_num = 0
two_0 = []
two_1 = []
for i in v:
    if i_num % 2 == 0:
        two_0.append(i)
    else:
        two_1.append(i)
    i_num += 1
two_1_counter = Counter(two_1)
t1_elem = two_1_counter.most_common()[0][0]
t1 = two_1_counter.most_common()[0][1]
two_0_counter = Counter(two_0)
if two_0_counter.most_common()[0][0] == t1_elem:
    if two_0_counter.most_common()[0][1] != len(two_0):
        if two_1_counter.most_common()[0][0] == len(two_1):
            if two_0_counter.most_common()[1][1] > two_1_counter.most_common()[1][1]:
                t0 = two_0_counter.most_common()[1][1]
            else:
                t1 = two_1_counter.most_common()[1][1]
        else:
            t1 = 0
    else:
        t0 = 0
else:
    t0 = two_0_counter.most_common()[0][1]
print(n - (t0+t1))


Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int, input().split()))
gu, ki = [], []
for i in range(n):
	if i % 2 == 0:
		ki.append(v[i])
	else:
		gu.append(v[i])
ki_flag, gu_flag = False, False
kict = Counter(ki)
guct = Counter(gu)
kict_mc = kict.most_common()
guct_mc = guct.most_common()
if len(kict_mc) > 1:
	ki_flag = True
if len(guct_mc) > 1:
	gu_flag = True
ki_first = kict_mc[0][0]
if ki_flag:
	ki_second = kict_mc[1][0]
gu_first = guct_mc[0][0]
if gu_flag:
	gu_second = guct_mc[1][0]
if ki_flag & gu_flag:
	if ki_first == gu_first:
		print(min([n - kict_mc[0][1] - guct_mc[1][1], n - kict_mc[1][1] - guct_mc[0][1]]))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif ki_flag:
	if ki_first == gu_first:
		print(n - kict_mc[1][1] - guct_mc[0][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif gu_flag:
	if ki_first == gu_first:
		print(n - kict_mc[0][1] - guct_mc[1][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
else:
	if ki_first == gu_first:
		print(int(n / 2))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])

Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
v = list(map(int, input().split()))
i_num = 0
two_0 = []
two_1 = []
for i in v:
    if i_num % 2 == 0:
        two_0.append(i)
    else:
        two_1.append(i)
    i_num += 1
two_1_counter = Counter(two_1)
t1_elem = two_1_counter.most_common()[0][0]
t1 = two_1_counter.most_common()[0][1]
two_0_counter = Counter(two_0)
if two_0_counter.most_common()[0][0] == t1_elem:
    if two_0_counter.most_common()[0][1] != len(two_0):
        if two_0_counter.most_common()[1][1] > two_1_counter.most_common()[1][1]:
            t0 = two_0_counter.most_common()[1][1]
        else:
            t1 = two_1_counter.most_common()[1][1]
    else:
        t0 = 0
else:
    t0 = two_0_counter.most_common()[0][1]
print(n - (t0+t1))


Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int, input().split()))
gu, ki = [], []
for i in range(n):
	if i % 2 == 0:
		ki.append(v[i])
	else:
		gu.append(v[i])
ki_flag, gu_flag = False, False
kict = Counter(ki)
guct = Counter(gu)
kict_mc = kict.most_common()
guct_mc = guct.most_common()
if len(kict_mc) > 1:
	ki_flag = True
if len(guct_mc) > 1:
	gu_flag = True
ki_first = kict_mc[0][0]
if ki_flag:
	ki_second = kict_mc[1][0]
gu_first = guct_mc[0][0]
if gu_flag:
	gu_second = guct_mc[1][0]
if ki_flag & gu_flag:
	if ki_first == gu_first:
		print(min([n - kict_mc[0][1] - guct_mc[1][1], n - kict_mc[1][1] - guct_mc[0][1]]))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif ki_flag:
	if ki_first == gu_first:
		print(n - kict_mc[1][1] - guct_mc[0][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif gu_flag:
	if ki_first == gu_first:
		print(n - kict_mc[0][1] - guct_mc[1][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
else:
	if ki_first == gu_first:
		print(int(n / 2))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
v = list(map(int, input().split()))
i_num = 0
two_0 = []
two_1 = []
t1 = 10 ** 5
ans = 0
for i in v:
    if i_num % 2 == 0:
        two_0.append(i)
    else:
        two_1.append(i)
    i_num += 1
c = 0
for i in two_0:
    if c < two_0.count(i):
        c = two_0.count(i)
        t0 = i
for i in two_0:
    if i != t0:
        ans += 1
c = 0
for i in two_1:
    if c < two_1.count(i) and i != t0:
        c = two_1.count(i)
        t1 = i
for i in two_1:
    if i != t1:
        ans += 1
print(ans)


Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int, input().split()))
gu, ki = [], []
for i in range(n):
	if i % 2 == 0:
		ki.append(v[i])
	else:
		gu.append(v[i])
ki_flag, gu_flag = False, False
kict = Counter(ki)
guct = Counter(gu)
kict_mc = kict.most_common()
guct_mc = guct.most_common()
if len(kict_mc) > 1:
	ki_flag = True
if len(guct_mc) > 1:
	gu_flag = True
ki_first = kict_mc[0][0]
if ki_flag:
	ki_second = kict_mc[1][0]
gu_first = guct_mc[0][0]
if gu_flag:
	gu_second = guct_mc[1][0]
if ki_flag & gu_flag:
	if ki_first == gu_first:
		print(min([n - kict_mc[0][1] - guct_mc[1][1], n - kict_mc[1][1] - guct_mc[0][1]]))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif ki_flag:
	if ki_first == gu_first:
		print(n - kict_mc[1][1] - guct_mc[0][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
elif gu_flag:
	if ki_first == gu_first:
		print(n - kict_mc[0][1] - guct_mc[1][1])
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])
else:
	if ki_first == gu_first:
		print(int(n / 2))
	else:
		print(n - kict_mc[0][1] - guct_mc[0][1])