Buggy python submission (verdict: Runtime Error):
import copy
N=int(input())

t=[0 for i in range(13)]
T=[0 for i in range(25)]
T[0]=1
T[24]=1

D=list(map(int,input().split()))

for i in range(N):
    t[D[i]]+=1
    
#print(t)
if t[0]>=1 or t[12]>=2 or max(t)>=3:
    print(0)
else:
    for i in range(len(t)):
        if t[i]==2:
            T[i]=1
            T[24-i]=1
    T[12]=t[12]
    #print(T)
    A=[[]for i in range(11)]
    for i in range(1,12):
        if t[i]==1:
            A[i-1]=[i,24-i]
    for i in range(10):
        if A[i]==[]:
            A[i]=[0,0]
    #print(A)
    
    MAX=0
    for i in range(2**10+1):
        S=copy.deepcopy(T)
        for j in range(11):
            if (i//(2**(9-j)))==1:
                S[A[j][1]]=1
            else:
                S[A[j][0]]=1
        L=100
        P=0
        for k in range(1,25):
            if S[k]==1:
                if L>(k-P):
                    L=(k-P)
                P=k
        if L>MAX:
            MAX=L
            #print(L)
            #print(S)
    print(MAX)

Fixed submission:
import copy
N=int(input())

t=[0 for i in range(13)]
T=[0 for i in range(25)]
T[0]=1
T[24]=1

D=list(map(int,input().split()))

for i in range(N):
    t[D[i]]+=1
    
#print(t)
if t[0]>=1 or t[12]>=2 or max(t)>=3:
    print(0)
else:
    for i in range(len(t)):
        if t[i]==2:
            T[i]=1
            T[24-i]=1
    T[12]=t[12]
    #print(T)
    A=[[]for i in range(11)]
    for i in range(1,12):
        if t[i]==1:
            A[i-1]=[i,24-i]
    for i in range(11):
        if A[i]==[]:
            A[i]=[0,0]
    #print(A)
    
    MAX=0
    for i in range(2**11+1):
        S=copy.deepcopy(T)
        I=i
        for j in range(11):
            if (I//(2**(10-j)))==1:
                S[A[j][1]]=1
            else:
                S[A[j][0]]=1
            I%=(2**(10-j))
        L=100
        P=0
        for k in range(1,25):
            if S[k]==1:
                if L>(k-P):
                    L=(k-P)
                P=k
        if L>MAX:
            MAX=L
            #print(L)
            #print(S)
    print(MAX)

Buggy python submission (verdict: Runtime Error):
import copy
N=int(input())

t=[0 for i in range(13)]
T=[0 for i in range(25)]
T[0]=1
T[24]=1

D=list(map(int,input().split()))

for i in range(N):
    t[D[i]]+=1
    
#print(t)
if t[0]>=1 or t[12]>=2 or max(t)>=3:
    print(0)
else:
    for i in range(len(t)):
        if t[i]==2:
            T[i]=1
            T[24-i]=1
    T[12]=t[12]
    #print(T)
    A=[[]for i in range(10)]
    for i in range(1,12):
        if t[i]==1:
            A[i-1]=[i,24-i]
    for i in range(10):
        if A[i]==[]:
            A[i]=[0,0]
    #print(A)
    
    MAX=0
    for i in range(2**10+1):
        S=copy.deepcopy(T)
        for j in range(10):
            if (i//(2**(9-j)))==1:
                S[A[j][1]]=1
            else:
                S[A[j][0]]=1
        L=100
        P=0
        for k in range(1,25):
            if S[k]==1:
                if L>(k-P):
                    L=(k-P)
                P=k
        if L>MAX:
            MAX=L
            #print(L)
            #print(S)
    print(MAX)

Fixed submission:
import copy
N=int(input())

t=[0 for i in range(13)]
T=[0 for i in range(25)]
T[0]=1
T[24]=1

D=list(map(int,input().split()))

for i in range(N):
    t[D[i]]+=1
    
#print(t)
if t[0]>=1 or t[12]>=2 or max(t)>=3:
    print(0)
else:
    for i in range(len(t)):
        if t[i]==2:
            T[i]=1
            T[24-i]=1
    T[12]=t[12]
    #print(T)
    A=[[]for i in range(11)]
    for i in range(1,12):
        if t[i]==1:
            A[i-1]=[i,24-i]
    for i in range(11):
        if A[i]==[]:
            A[i]=[0,0]
    #print(A)
    
    MAX=0
    for i in range(2**11+1):
        S=copy.deepcopy(T)
        I=i
        for j in range(11):
            if (I//(2**(10-j)))==1:
                S[A[j][1]]=1
            else:
                S[A[j][0]]=1
            I%=(2**(10-j))
        L=100
        P=0
        for k in range(1,25):
            if S[k]==1:
                if L>(k-P):
                    L=(k-P)
                P=k
        if L>MAX:
            MAX=L
            #print(L)
            #print(S)
    print(MAX)