Buggy python submission (verdict: Runtime Error):
n=int(input())
v=list(map(int,input().split()))
a=v[0::2]
b=v[1::2]
c=dict()
d=dict()

for i in a:
  if i in c:
    c[i]+=1
  else:
    c[i]=1
for j in b:
  if j in d:
    d[j]+=1
  else:
    d[j]=1

e=sorted([[w,v] for v,w in c.items()],reverse=True)
f=sorted([[w,v] for v,w in d.items()],reverse=True)

if e[0][1]!=f[0][1]:
  print(n-e[0][0]-f[0][0])
elif e[0][0]>f[0][0]:
  print(n-e[0][0]-f[1][0])
elif e[0][0]<f[0][0]:
  print(n-e[1][0]-f[0][0])
elif e[0][0]==f[0][0] and e[0][1]==f[0][1]:
  if e[1][0]>f[1][0]:
    print(n-e[1][0]-f[0][0])
  else:
    print(n-e[0][0]-f[1][0])


Fixed submission:
from collections import defaultdict
n = int(input())
A = [int(x) for x in input().split()]
even = A[0::2]
odd = A[1::2]
EC = defaultdict(int)
EC[0] = 0
OC = defaultdict(int)
OC[0] = 0
for e in even:
  EC[e] += 1
for o in odd:
  OC[o] += 1
E = sorted([[v, k] for k, v in EC.items()], reverse=True)
O = sorted([[v, k] for k, v in OC.items()], reverse=True)
if E[0][1] != O[0][1]:
  print(n - E[0][0] - O[0][0])
elif E[1][0] >= O[1][0]:
  print(n - E[1][0] - O[0][0])
else:
  print(n - E[0][0] - O[1][0])

#sample code.

Buggy python submission (verdict: Runtime Error):
n=int(input())
v=list(map(int,input().split()))
a=v[0::2]
b=v[1::2]
c=dict()
d=dict()

for i in a:
  if i in c:
    c[i]+=1
  else:
    c[i]=1
for j in b:
  if j in d:
    d[j]+=1
  else:
    d[j]=1

e=sorted([[c,v] for v,c in c.items()],reverse=True)
f=sorted([[c,v] for v,c in d.items()],reverse=True)

if e[0][1]!=f[0][1]:
  print(n-e[0][0]-f[0][0])
elif e[0][0]>f[0][0]:
  print(n-e[0][0]-f[1][0])
else:
  print(n-e[1][0]-f[0][0])

Fixed submission:
from collections import defaultdict
n = int(input())
A = [int(x) for x in input().split()]
even = A[0::2]
odd = A[1::2]
EC = defaultdict(int)
EC[0] = 0
OC = defaultdict(int)
OC[0] = 0
for e in even:
  EC[e] += 1
for o in odd:
  OC[o] += 1
E = sorted([[v, k] for k, v in EC.items()], reverse=True)
O = sorted([[v, k] for k, v in OC.items()], reverse=True)
if E[0][1] != O[0][1]:
  print(n - E[0][0] - O[0][0])
elif E[1][0] >= O[1][0]:
  print(n - E[1][0] - O[0][0])
else:
  print(n - E[0][0] - O[1][0])

#sample code.

Buggy python submission (verdict: Runtime Error):
n=int(input())
v=list(map(int,input().split()))
a=v[0::2]
b=v[1::2]
c=dict()
d=dict()

for i in a:
  if i in c:
    c[i]+=1
  else:
    c[i]=1
for j in d:
  if j in d:
    d[j]+=1
  else:
    d[j]=1

e=sorted([[c,v] for v,c in c.items()],reverse=True)
f=sorted([[c,v] for v,c in d.items()],reverse=True)

if e[0][1]!=f[0][1]:
  print(n-e[0][0]-f[0][0])
elif e[0][0]>f[0][0]:
  print(n-e[0][0]-f[1][0])
else:
  print(n-e[1][0]-f[0][0])

Fixed submission:
from collections import defaultdict
n = int(input())
A = [int(x) for x in input().split()]
even = A[0::2]
odd = A[1::2]
EC = defaultdict(int)
EC[0] = 0
OC = defaultdict(int)
OC[0] = 0
for e in even:
  EC[e] += 1
for o in odd:
  OC[o] += 1
E = sorted([[v, k] for k, v in EC.items()], reverse=True)
O = sorted([[v, k] for k, v in OC.items()], reverse=True)
if E[0][1] != O[0][1]:
  print(n - E[0][0] - O[0][0])
elif E[1][0] >= O[1][0]:
  print(n - E[1][0] - O[0][0])
else:
  print(n - E[0][0] - O[1][0])

#sample code.

Buggy python submission (verdict: Runtime Error):
n=int(input())
v=list(map(int,input().split()))
a=[]
b=[]
c=dict()
d=dict()

for i in range(0,n,2):
  a.append(v[i])
  if v[i] in c:
    c[v[i]]+=1
  else:
    c[v[i]]=1
    
for j in range(1,n,2):
  b.appene(v[j])
  if v[i] in d:
    d[v[i]]+=1
  else:
    d[v[i]]=1

c_max=c.pop(c.value(max(c.value())))
c_max2=c.pop(c.value(max(c.value())))
d_max=d.pop(d.value(max(d.value())))
d_max2=d.pop(d.value(max(d.value())))
    
if :
  print(n-c_max-d_max)
else:
  if c_max>d_max:
    print(n-c_max-d_max2)
  else:
    print(n-c_max2-d_max)

Fixed submission:
from collections import defaultdict
n = int(input())
A = [int(x) for x in input().split()]
even = A[0::2]
odd = A[1::2]
EC = defaultdict(int)
EC[0] = 0
OC = defaultdict(int)
OC[0] = 0
for e in even:
  EC[e] += 1
for o in odd:
  OC[o] += 1
E = sorted([[v, k] for k, v in EC.items()], reverse=True)
O = sorted([[v, k] for k, v in OC.items()], reverse=True)
if E[0][1] != O[0][1]:
  print(n - E[0][0] - O[0][0])
elif E[1][0] >= O[1][0]:
  print(n - E[1][0] - O[0][0])
else:
  print(n - E[0][0] - O[1][0])

#sample code.