Buggy python submission (verdict: Runtime Error):
N = int(input())
V = list(map(int,input().split()))
D1 = {}
D2 = {}
for i in range(N) :
    if i % 2 == 0:
        if V[i] in D1 :
            D1[V[i]] += 1
        else :
            D1[V[i]] = 1
    else :
        if V[i] in D2 :
            D2[V[i]] += 1
        else :
            D2[V[i]] = 1
m1 = max(D1.values())
m2 = max(D2.values())
if max(D1,key = D1.get) != max(D2,key = D2.get) :
    print(N-m1-m2)
else :
    D1[max(D1,key=D1.get)] = 0
    D2[max(D2,key=D1.get)] = 0
    mm1 = max(D1.values())
    mm2 = max(D2.values())
    if mm1 >= mm2 :
        print(N-m2-mm1)
    else :
        print(N-m1-mm2)


Fixed submission:
#input phase
N = int(input())
V = list(map(int,input().split()))
#make dictionary
D1 = {}
D2 = {}
#append element to dictionary
for i in range(N):
    if i % 2 == 0 :
        if V[i] in D1 :
            D1[V[i]] += 1
        else:
            D1[V[i]] = 1
    else:
        if V[i] in D2 :
            D2[V[i]] += 1
        else:
            D2[V[i]] = 1
#define max-value of each dictionary
maxD1 = max(D1.values())
maxD2 = max(D2.values())
# I haven't appreciated dictionary method well...
if max(D1, key=D1.get) != max(D2, key=D2.get):
    print(N-maxD1-maxD2)
else:
    D1[max(D1, key=D1.get)] = 0
    D2[max(D2, key=D2.get)] = 0
    maxD12 = max(D1.values())
    maxD22 = max(D2.values())
    if maxD12 >= maxD22 :
        if len(D1) > 1 :
            print(N-maxD12-maxD2)
        else :
            print(N-maxD2)
    else :
        if len(D2) > 1 :
            print(N-maxD1-maxD22)
        else :
            print(N-maxD2)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
V = list(map(int,input().split()))
L1 = []
L2 = []
for i in range(n) :
    if i % 2 == 0 :
        L1.append(V[i])
    else :
        L2.append(V[i])
T1 = list(set(L1))
T2 = list(set(L2))
X1 = []
X2 = []
for j in range(len(T1)) :
    X1.append(L1.count(T1[j]))
for k in range(len(T2)) :
    X2.append(L2.count(T2[k]))

p = len(T1)
q = len(T2)
if p == 1 and q == 1 :
    if L1[0] != L2[0] :
        print(0)
    else :
        print(len(L2))
elif p != 1 and q == 1 :
    print(sum(X1)-max(X1))
elif p == 1 and q != 1 :
    print(sum(X2)-max(X2))
else :
    print(sum(X1)-max(X1)+sum(X2)-max(X2))


Fixed submission:
#input phase
N = int(input())
V = list(map(int,input().split()))
#make dictionary
D1 = {}
D2 = {}
#append element to dictionary
for i in range(N):
    if i % 2 == 0 :
        if V[i] in D1 :
            D1[V[i]] += 1
        else:
            D1[V[i]] = 1
    else:
        if V[i] in D2 :
            D2[V[i]] += 1
        else:
            D2[V[i]] = 1
#define max-value of each dictionary
maxD1 = max(D1.values())
maxD2 = max(D2.values())
# I haven't appreciated dictionary method well...
if max(D1, key=D1.get) != max(D2, key=D2.get):
    print(N-maxD1-maxD2)
else:
    D1[max(D1, key=D1.get)] = 0
    D2[max(D2, key=D2.get)] = 0
    maxD12 = max(D1.values())
    maxD22 = max(D2.values())
    if maxD12 >= maxD22 :
        if len(D1) > 1 :
            print(N-maxD12-maxD2)
        else :
            print(N-maxD2)
    else :
        if len(D2) > 1 :
            print(N-maxD1-maxD22)
        else :
            print(N-maxD2)

Buggy python submission (verdict: Time Limit Exceeded):
n = int(input())
V = list(map(int,input().split()))
L1 = []
L2 = []
for i in range(n) :
    if i % 2 == 0 :
        L1.append(V[i])
    else :
        L2.append(V[i])
T1 = list(set(L1))
T2 = list(set(L2))
X1 = []
X2 = []
for j in range(len(T1)) :
    X1.append(L1.count(T1[j]))
for k in range(len(T2)) :
    X2.append(L2.count(T2[k]))

p = len(T1)
q = len(T2)
if p == 1 and q == 1 :
    if L1[0] != L2[0] :
        print(0)
    else :
        print(len(L2))
elif p != 1 and q == 1 :
    print(sum(X1)-max(X1))
elif p == 1 and q != 1 :
    print(sum(X2)-max(X2))
else :
    print(sum(X1)-max(X1)+sum(X2)-max(X2))


Fixed submission:
#input phase
N = int(input())
V = list(map(int,input().split()))
#make dictionary
D1 = {}
D2 = {}
#append element to dictionary
for i in range(N):
    if i % 2 == 0 :
        if V[i] in D1 :
            D1[V[i]] += 1
        else:
            D1[V[i]] = 1
    else:
        if V[i] in D2 :
            D2[V[i]] += 1
        else:
            D2[V[i]] = 1
#define max-value of each dictionary
maxD1 = max(D1.values())
maxD2 = max(D2.values())
# I haven't appreciated dictionary method well...
if max(D1, key=D1.get) != max(D2, key=D2.get):
    print(N-maxD1-maxD2)
else:
    D1[max(D1, key=D1.get)] = 0
    D2[max(D2, key=D2.get)] = 0
    maxD12 = max(D1.values())
    maxD22 = max(D2.values())
    if maxD12 >= maxD22 :
        if len(D1) > 1 :
            print(N-maxD12-maxD2)
        else :
            print(N-maxD2)
    else :
        if len(D2) > 1 :
            print(N-maxD1-maxD22)
        else :
            print(N-maxD2)