Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
v1 = [v[0]]
v2 = []
for i in range(1,n):
    if i % 2 == 0:
        v1.append(v[i])
    else:
        v2.append(v[i])
c1 = Counter(v1)
c2 = Counter(v2)
mode1 = c1.most_common(1)
mode2 = c2.most_common(1)
if mode1[0][0] != mode2[0][0]:
    ans1 = len(v1)-mode1[0][1]
    ans2 = len(v2)-mode2[0][1]
    ans = ans1 + ans2
else:
    if mode1[0][1] == len(v1) and mode2[0][1] == len(v2):
       ans = min(mode1[0][1],mode2[0][1])
    elif mode1[0][1] == len(v1):
        ans1 = len(v)-mode2[0][1]
        ans2 = len(v)-mode1[0][1]-mode2[1][1]
        ans = min(ans1,ans2)
    elif mode2[0][1] == len(v2):
        ans1 = len(v)-mode1[1][1]-mode2[0][1]  
        ans2 = len(v)-mode1[0][1]
        ans = min(ans1,ans2)
    else:
        ans1 = len(v)-mode1[0][1]-mode2[1][1]
        ans2 = len(v)-mode1[1][1]-mode2[0][1]
        ans = min(ans1,ans2)
print(ans)

Fixed submission:
from collections import Counter

n = int(input())

e = []
o = []
for i, v in enumerate(input().split(' ')):
    if i % 2 == 0:
        e.append(int(v))
    else:
        o.append(int(v))

if len(set(e + o)) == 1:
    print(int(len(e + o) / 2))
    exit()

if Counter(o).most_common()[0][0] == Counter(e).most_common()[0][0]:
    ans = min(len(o) - Counter(o).most_common()[1][1] + len(e) - Counter(e).most_common()[0][1], len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[1][1])
    print(ans)
else:
    print(len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[0][1])

Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
v1 = [v[0]]
v2 = []
for i in range(1,n):
    if i % 2 == 0:
        v1.append(v[i])
    else:
        v2.append(v[i])
c1 = Counter(v1)
c2 = Counter(v2)
mode1 = c1.most_common(1)
mode2 = c2.most_common(1)
if mode1[0][0] != mode2[0][0]:
    ans1 = len(v1)-mode1[0][1]
    ans2 = len(v2)-mode2[0][1]
    ans = ans1 + ans2
else:
    if mode1[0][1] == len(v1) and mode2[0][1] == len(v2):
       ans = min(mode1[0][1],mode2[0][1])
    elif mode1[0][1] == len(v1):
        ans = len(v)-mode1[0][1]-mode2[1][1]
    elif mode2[0][1] == len(v2):
        ans = len(v)-mode1[1][1]-mode2[0][1]  
    else:
        ans1 = len(v)-mode1[0][1]-mode2[1][1]
        ans2 = len(v)-mode1[1][1]-mode2[0][1]
        ans = min(ans1,ans2)
print(ans)

Fixed submission:
from collections import Counter

n = int(input())

e = []
o = []
for i, v in enumerate(input().split(' ')):
    if i % 2 == 0:
        e.append(int(v))
    else:
        o.append(int(v))

if len(set(e + o)) == 1:
    print(int(len(e + o) / 2))
    exit()

if Counter(o).most_common()[0][0] == Counter(e).most_common()[0][0]:
    ans = min(len(o) - Counter(o).most_common()[1][1] + len(e) - Counter(e).most_common()[0][1], len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[1][1])
    print(ans)
else:
    print(len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[0][1])

Buggy python submission (verdict: Runtime Error):
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
v1 = [v[0]]
v2 = []
for i in range(1,n):
    if i % 2 == 0:
        v1.append(v[i])
    else:
        v2.append(v[i])
c1 = Counter(v1)
c2 = Counter(v2)
mode1 = c1.most_common(1)
mode2 = c2.most_common(1)
if mode1[0][0] != mode2[0][0]:
    ans1 = len(v1)-mode1[0][1]
    ans2 = len(v2)-mode2[0][1]
    ans = ans1 + ans2
else:
    if mode1[0][1] == len(v1) and mode2[0][1] == len(v2):
       ans = min(mode1[0][1],mode2[0][1])
    else:
        ans1 = len(v)-mode1[0][1]-mode2[1][1]
        ans2 = len(v)-mode1[1][1]-mode2[0][1]
        ans = min(ans1,ans2)
print(ans)

Fixed submission:
from collections import Counter

n = int(input())

e = []
o = []
for i, v in enumerate(input().split(' ')):
    if i % 2 == 0:
        e.append(int(v))
    else:
        o.append(int(v))

if len(set(e + o)) == 1:
    print(int(len(e + o) / 2))
    exit()

if Counter(o).most_common()[0][0] == Counter(e).most_common()[0][0]:
    ans = min(len(o) - Counter(o).most_common()[1][1] + len(e) - Counter(e).most_common()[0][1], len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[1][1])
    print(ans)
else:
    print(len(o) - Counter(o).most_common()[0][1] + len(e) - Counter(e).most_common()[0][1])