Buggy python submission (verdict: Runtime Error):
n = int(input()) # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(n):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]
l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1,key=lambda d:d[1],reverse=True)

if l0[0][0]!=l1[0][0]:
    print(len(num)-l0[0][1]-l1[0][1])
elif len(num)==2:
    print(1)
else:
    s=0
    if l0[0][1]>=l1[0][1]:
        s=l0[0][1]+l1[1][1]
    else:
        s=l0[1][1]+l1[0][1]
    print(len(num)-s)

Fixed submission:
n = int(input()) # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(n):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]

l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1, key=lambda d:d[1],reverse=True)

l0.append(("wild card",0))
l1.append(("wild card",0))

if l0[0][0]!=l1[0][0]: #文字が同じ場合
    print(len(num)-l0[0][1]-l1[0][1])
elif n==2:
    print(1)
else:
    print(n-max(l0[0][1]+l1[1][1],l0[1][1]+l1[0][1]))

Buggy python submission (verdict: Runtime Error):
str = input() # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(len(num)):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]
l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1,key=lambda d:d[1],reverse=True)

if l0[0][0]!=l1[0][0]:
    print(len(num)-l0[0][1]-l1[0][1])
elif len(num)==2:
    print(1)
else:
    s=0
    if l0[0][1]>=l1[0][1]:
        s=l0[0][1]+l1[1][1]
    else:
        s=l0[1][1]+l1[0][1]
    print(len(num)-s)


Fixed submission:
n = int(input()) # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(n):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]

l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1, key=lambda d:d[1],reverse=True)

l0.append(("wild card",0))
l1.append(("wild card",0))

if l0[0][0]!=l1[0][0]: #文字が同じ場合
    print(len(num)-l0[0][1]-l1[0][1])
elif n==2:
    print(1)
else:
    print(n-max(l0[0][1]+l1[1][1],l0[1][1]+l1[0][1]))

Buggy python submission (verdict: Runtime Error):
str = input() # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(len(num)):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]
l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1,key=lambda d:d[1],reverse=True)


if l0[0][0]!=l1[0][0]:
    print(len(num)-l0[0][1]-l1[0][1])
else:
    s=0
    if l0[0][1]>=l1[0][1]:
        s=l0[0][1]+l1[1][1]
    else:
        s=l0[1][1]+l1[0][1]
    print(len(num)-s)


Fixed submission:
n = int(input()) # sを取得し、strに値を入れる
num= input()
num=list(map(int,num.split()))

from collections import defaultdict

d0=defaultdict(int)
d1=defaultdict(int)
for i in range(n):
    if i%2==0:
        d0[num[i]]+=1
    else:
        d1[num[i]]+=1

l0=[(k,d0[k]) for k in d0]
l1=[(k,d1[k]) for k in d1]

l0=sorted(l0, key=lambda d:d[1],reverse=True)
l1=sorted(l1, key=lambda d:d[1],reverse=True)

l0.append(("wild card",0))
l1.append(("wild card",0))

if l0[0][0]!=l1[0][0]: #文字が同じ場合
    print(len(num)-l0[0][1]-l1[0][1])
elif n==2:
    print(1)
else:
    print(n-max(l0[0][1]+l1[1][1],l0[1][1]+l1[0][1]))