Buggy python submission (verdict: Runtime Error):
from collections import Counter

n = int(input())
if(n == 2):
    print(0)
else:
    n2 = n/2
    v = [int(i) for i in input().split()]
    v1 = Counter(v[::2])
    v2 = Counter(v[1::2])
    v1mc = v1.most_common()
    v2mc = v2.most_common()
    if(v1mc[0][0] == v2mc[0][0]):
        print(n - max(v1mc[0][1]+v2mc[1][1], v2mc[0][1]+v1mc[1][1]))
    else:
        print(n - (v1mc[0][1]+v2mc[0][1]))


Fixed submission:
from collections import Counter

n = int(input())
v = [int(i) for i in input().split()]
v1 = Counter(v[::2])
v2 = Counter(v[1::2])
v1mc = v1.most_common()
v2mc = v2.most_common()
if(v1mc[0][0] == v2mc[0][0]):
    if(len(v1mc) == 1 and len(v2mc) == 1):
        print(int(n/2))
    elif(len(v1mc) == 1):
        print(n - (v1mc[0][1]+v2mc[1][1]))
    elif(len(v2mc) == 1):
        print(n - (v2mc[0][1]+v1mc[1][1]))
    else:
        print(n - max(v1mc[0][1]+v2mc[1][1], v2mc[0][1]+v1mc[1][1]))
else:
    print(n - (v1mc[0][1]+v2mc[0][1]))

Buggy python submission (verdict: Runtime Error):
n = int(input())
n2 = n/2
v = [int(i) for i in input().split()]
v1 = []
v2 = []
for i in range(n):
    if(i % 2 == 0):
        v1.append(v[i])
    else:
        v2.append(v[i])
count1 = [v1.count(v1[i]) for i in range(int(n2))]
count2 = [v2.count(v2[i]) for i in range(int(n2))]
if(v1[count1.index(max(count1))] == v2[count2.index(max(count2))]):
    max1 = max(count1)
    max2 = max(count2)
    count1 = list(set(count1))
    count1.remove(max(count1))
    count2 = list(set(count2))
    count2.remove(max(count2))
    if(max(count1) > max(count2)):
        print(n - max(count1) - max2)
    else:
        print(n - max(count2) - max1)
else:
    print(n - max1 - max2)


Fixed submission:
from collections import Counter

n = int(input())
v = [int(i) for i in input().split()]
v1 = Counter(v[::2])
v2 = Counter(v[1::2])
v1mc = v1.most_common()
v2mc = v2.most_common()
if(v1mc[0][0] == v2mc[0][0]):
    if(len(v1mc) == 1 and len(v2mc) == 1):
        print(int(n/2))
    elif(len(v1mc) == 1):
        print(n - (v1mc[0][1]+v2mc[1][1]))
    elif(len(v2mc) == 1):
        print(n - (v2mc[0][1]+v1mc[1][1]))
    else:
        print(n - max(v1mc[0][1]+v2mc[1][1], v2mc[0][1]+v1mc[1][1]))
else:
    print(n - (v1mc[0][1]+v2mc[0][1]))

Buggy python submission (verdict: Runtime Error):
n = int(input())
n2 = n/2
v = [int(i) for i in input().split()]
v1 = []
v2 = []
for i in range(n):
    if(i % 2 == 1):
        v2.append(v[i])
    else:
        v1.append(v[i])
count1 = [v1.count(v1[i]) for i in range(int(n2))]
count2 = [v2.count(v2[i]) for i in range(int(n2))]
if(v1[count1.index(max(count1))] == v2[count2.index(max(count2))]):
    count2 = list(set(count2))
    count2.sort()
    print(int(n - max(count1) - count2[1]))
else:
    print(int(n - max(count1) - max(count2)))


Fixed submission:
from collections import Counter

n = int(input())
v = [int(i) for i in input().split()]
v1 = Counter(v[::2])
v2 = Counter(v[1::2])
v1mc = v1.most_common()
v2mc = v2.most_common()
if(v1mc[0][0] == v2mc[0][0]):
    if(len(v1mc) == 1 and len(v2mc) == 1):
        print(int(n/2))
    elif(len(v1mc) == 1):
        print(n - (v1mc[0][1]+v2mc[1][1]))
    elif(len(v2mc) == 1):
        print(n - (v2mc[0][1]+v1mc[1][1]))
    else:
        print(n - max(v1mc[0][1]+v2mc[1][1], v2mc[0][1]+v1mc[1][1]))
else:
    print(n - (v1mc[0][1]+v2mc[0][1]))

Buggy python submission (verdict: Runtime Error):
n = int(input())
v = [int(i) for i in input().split()]
v1 = []
v2 = []
for i in range(n):
    if(i % 2 == 1):
        v1.append(v[i])
    else:
        v2.append(v[i])
count1 = [v1.count(v1[i]) for i in range(int(n/2))]
count1 = list(set(count1))
count1.sort()
count2 = [v2.count(v2[i]) for i in range(int(n/2))]
count2 = list(set(count2))
count2.sort()
if(count1[0] == count2[0]):
    print(int(n/2 - count1[0] + n/2 - count2[1]))
else:
    print(int(n/2 - count1[0] + n/2 - count2[0]))


Fixed submission:
from collections import Counter

n = int(input())
v = [int(i) for i in input().split()]
v1 = Counter(v[::2])
v2 = Counter(v[1::2])
v1mc = v1.most_common()
v2mc = v2.most_common()
if(v1mc[0][0] == v2mc[0][0]):
    if(len(v1mc) == 1 and len(v2mc) == 1):
        print(int(n/2))
    elif(len(v1mc) == 1):
        print(n - (v1mc[0][1]+v2mc[1][1]))
    elif(len(v2mc) == 1):
        print(n - (v2mc[0][1]+v1mc[1][1]))
    else:
        print(n - max(v1mc[0][1]+v2mc[1][1], v2mc[0][1]+v1mc[1][1]))
else:
    print(n - (v1mc[0][1]+v2mc[0][1]))