Buggy python submission (verdict: Runtime Error):
import collections
n = int(input())
v = list(map(int,input().split()))
ev = [v[i] for i in range(n) if i % 2 == 0]
ov = [v[i] for i in range(n) if i % 2 == 1]
#print(ov,ev)
E = collections.Counter(ev).most_common()
#print(E)
if len(E) == 1:
    e = E[0][0]
    e1 = E[0][0]
    e2 = E[0][0]
else:
    e1 = E[0][0]
    e2 = E[1][0]
O = collections.Counter(ov).most_common()
#print(O)
if len(O) == 1:
    o = O[0][0]
    if e == o:
        print(n//2)
        exit()
    else:
        print(0)
        exit()
else:
    o1 = O[0][0]
    o2 = O[1][0]

tmp = 0
for i in range(n):
    if i % 2 == 0 and v[i] != e1:
        tmp += 1
    elif i % 2 == 1 and v[i] != o2:
        tmp += 1
ttmp = 0
for i in range(n):
    if i % 2 == 0 and v[i] != e2:
        ttmp += 1
    elif i % 2 == 1 and v[i] != o1:
        ttmp += 1
        
print(min(tmp,ttmp))

Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import collections
import itertools
n = int(input())
v = list(map(int,input().split()))
#n = len(v)
c = collections.Counter(v).most_common()
if len(c) == 1:
    print(n//2)
    exit()
values, counts = zip(*c)
k = sorted(list(set(counts)),reverse=True)[:2]
pairs = []
for vcnt in c:
    val = vcnt[0]
    cnt = vcnt[1]
    #print(val,cnt)
    if cnt in k:
        pairs.append(val)
#print(pairs)
P = list(itertools.combinations(pairs,2))
#print(P)
ans = float('inf')
for pair in P:
    #print(pair)
    mc = pair[0]
    sc = pair[1]
    tmp = 0
    for i in range(n):
        if i % 2 == 0 and v[i] != mc:
            tmp += 1
        elif i % 2 == 1 and v[i] != sc:
            tmp += 1
    ttmp = 0
    for i in range(n):
        if i % 2 == 0 and v[i] != sc:
            ttmp += 1
        elif i % 2 == 1 and v[i] != mc:
            ttmp += 1

    ans = min(ans,min(tmp,ttmp))
    
print(ans)

Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)

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

N = int(input())
v = list(map(int,input().split()))
d = Counter(v).most_common()
most_common = d[0][0]
try:
    second_common = d[1][0]
except:
    print(N//2)
    exit()
try:
    third_common = d[2][0]
except:
    third_common = float('Inf')

def f(v,m,s):
    cnt = 0
    for j in range(N):
        if j % 2 != 0:
            if v[j] != m:
                cnt += 1
        else:
            if v[j] != s:
                cnt += 1
    return cnt

p = [most_common,second_common,third_common]
p = list(product(p,p))
p = [i for i in p if i[0] != i[1]]
ans = float('inf')
for i in p:
    tmp = f(v,i[0],i[1])
    ans = min(ans,tmp)
print(ans)


Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)

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

def f(v,m,s):
    cnt = 0
    for j in range(N):
        if j % 2 != 0:
            if v[j] != m:
                cnt += 1
        else:
            if v[j] != s:
                cnt += 1
    return cnt

N = int(input())
v = list(map(int,input().split()))
d = Counter(v).most_common()
#print(d)
try:
    second_common = d[1][0]
except:
    print(N//2)
    exit()
J = [i[0] for i in d]
p = list(product(J,J))
p = [i for i in p if i[0] != i[1]]
#print(p)
ans = float('inf')
for i in p:
    tmp = f(v,i[0],i[1])
    ans = min(ans,tmp)

print(ans)

Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
import copy
N = int(input())
v = list(map(int,input().split()))
values = list(set(v))
d = {}
for i in range(len(values)):
    number  = v.count(values[i])
    d[values[i]] = number
d  = sorted(d.items(), key=lambda x: x[1],reverse=True)

most_common = d[0][0]
#v_ = [i for i in v if i != most_common]
try:
    second_common = d[1][0]
except:
    second_common = most_common + 1
#print(v)
vv = copy.deepcopy(v)
cnt = 0
for j in range(N):
    if j % 2 != 0:
        if v[j] != most_common:
            #v[j] = most_common
            cnt += 1
    else:
        if v[j] != second_common:
            #v[j] = second_common
            cnt += 1
ccnt = 0
for j in range(N):
    if j % 2 != 0:
        if vv[j] != second_common:
            #vv[j] = second_common
            ccnt += 1
    else:
        if vv[j] != most_common:
            #vv[j] = most_common
            ccnt += 1
#print(v,cnt)
#print(vv,ccnt)
print(min(cnt,ccnt))

Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
from statistics import mode
import copy
N = int(input())
v = list(map(int,input().split()))
values = list(set(v))
d = {}
for i in range(len(values)):
    number  = v.count(values[i])
    d[values[i]] = number
d  = sorted(d.items(), key=lambda x: x[1],reverse=True)

most_common = d[0][0]
#v_ = [i for i in v if i != most_common]
try:
    second_common = d[1][0]
except:
    second_common = most_common + 1
#print(v)
vv = copy.deepcopy(v)
cnt = 0
for j in range(N):
    if j % 2 != 0:
        if v[j] != most_common:
            v[j] = most_common
            cnt += 1
    else:
        if v[j] != second_common:
            v[j] = second_common
            cnt += 1
ccnt = 0
for j in range(N):
    if j % 2 != 0:
        if vv[j] != second_common:
            vv[j] = second_common
            ccnt += 1
    else:
        if vv[j] != most_common:
            vv[j] = most_common
            ccnt += 1
#print(v,cnt)
#print(vv,ccnt)
print(min(cnt,ccnt))

Fixed submission:
from collections import Counter
n = int(input())
v = list(map(int,input().split()))
o = Counter(v[::2]).most_common()
o.append((0,0))
e = Counter(v[1::2]).most_common()
e.append((0,0))
if o[0][0] == e[0][0]:
    ans = min(n - o[0][1] - e[1][1], n - o[1][1] - e[0][1])
else:
    ans = n - o[0][1] - e[0][1]
print(ans)