qyliang/CodeNanoFix huggingface dataset:
Buggy code:
def s_gen():
    for x in S: 
        yield x
def t_gen():
    for x in T:
        yield x
        

N=int(input())
S=input()[:N]
T=input()[:N]
it=s_gen()
it2=t_gen()

print("".join([next(it)+next(it2) for _ in range(N)]))

Fixed code:
def s_gen():
    for x in S: 
        yield x
def t_gen():
    for x in T:
        yield x
        

N=int(input())
S,T=input().split()
S,T=S[:N],T[:N]

it=s_gen()
it2=t_gen()

print("".join([next(it)+next(it2) for _ in range(N)]))
Buggy code:
NNN = input()

S = str(input())
T = str(input())

S_list =list(S)
T_list =list(T)

N = len(S_list)
outstr = []

for n in range(N*2):
    if n%2 == 0:
        outstr.append(S_list[int(n / 2)])
    else:
        outstr.append(T_list[int(n / 2)])

STR = ','.join(outstr)
STR2 = STR.replace(",", "")
print(STR2)


Fixed code:

NNN = input()

S,T = map(str, input().split())

S_list =list(S)
T_list =list(T)

N = len(S_list)
outstr = []

for n in range(N*2):
    if n%2 == 0:
        outstr.append(S_list[int(n / 2)])
    else:
        outstr.append(T_list[int(n / 2)])

STR = ','.join(outstr)
STR2 = STR.replace(",", "")
print(STR2)
Buggy code:
n = int(input())
s, t = input().split()

r = []
for i in range(len(s)):
  str.append(s[i])
  str.append(t[i])

print(''.join(r))


Fixed code:
n = int(input())
s, t = input().split()

r = []
for i in range(n):
    r.append(s[i])
    r.append(t[i])

print(''.join(r))
Buggy code:
new_str = ""
num = int(input())
string = input().split(" ")
for i in range(0,num):
    new_str += string[0][i] + string[i][0]
print("".join(new_str))

Fixed code:
new_str = ""
num = int(input())
string = input().split(" ")
for i in range(0,num):
    new_str += string[0][i] + string[1][i]
print(new_str)
Buggy code:
from collections import defaultdict
import sys
import math
from datetime import datetime
import re
import math
def sol(n, S, T):
    ans = ""
    for i in range(n):
        ans += S[i]
        ans += T[i]
    return ans





do_submit = True
#do_submit = False

def input_parse(input_str):
    lines = [x.strip() for x in input_str.split("\n") if x.strip()]
    parsed_lines = [list(map(str, line.split())) for line in lines]
    print(parsed_lines)
    # n = int(parsed_lines[0][0])
    # k = int(parsed_lines[0][1])
    S = parsed_lines[0][0]
    return S


if not do_submit:
    S = input_parse("""
    1905
    """)
    print(sol(S))

    S = input_parse("""
    0112
    """)
    print(sol(S))

    S = input_parse("""
    1700
    """)
    print(sol(S))

    S = input_parse("""
    0000
    """)
    print(sol(S))

    S = input_parse("""
    1001
    """)
    print(sol(S))



else:
    #A, B = list(map(int, input().split()))
    n = int(input())
    S = input()
    T = input()
    print(sol(n, S, T))

    # S = input().strip()
    # print(sol(S))

Fixed code:
from collections import defaultdict
import sys
import math
from datetime import datetime
import re
import math
def sol(n, S, T):
    ans = ""
    for i in range(n):
        ans += S[i]
        ans += T[i]
    return ans





do_submit = True
#do_submit = False

def input_parse(input_str):
    lines = [x.strip() for x in input_str.split("\n") if x.strip()]
    parsed_lines = [list(map(str, line.split())) for line in lines]
    print(parsed_lines)
    # n = int(parsed_lines[0][0])
    # k = int(parsed_lines[0][1])
    S = parsed_lines[0][0]
    return S


if not do_submit:
    S = input_parse("""
    1905
    """)
    print(sol(S))

    S = input_parse("""
    0112
    """)
    print(sol(S))

    S = input_parse("""
    1700
    """)
    print(sol(S))

    S = input_parse("""
    0000
    """)
    print(sol(S))

    S = input_parse("""
    1001
    """)
    print(sol(S))



else:
    #A, B = list(map(int, input().split()))
    n = int(input())
    S, T = list(map(str, input().split()))
    # S = input()
    # T = input()
    print(sol(n, S, T))

    # S = input().strip()
    # print(sol(S))
Buggy code:
n=int(input())
a,b=input().split()
c=""
for _ in range(n):
  c+=a[0]+b[0]
print(c)

Fixed code:
n=int(input())
a,b=input().split()
c=""
for _ in range(n):
  c+=a[_]+b[_]
print(c)
Buggy code:
n = int(input())
s,t = input().split()
new = ''
for i in range(0, n):
	new += s[i]
  	new += t[i]
print (new)

Fixed code:
n = int(input())
s,t = input().split()
new = ''
for i in range(n):
  new += s[i]
  new += t[i]
print (new)
Buggy code:
n=int(input())
s=list(input())
s,t=s[:n],s[n+1:]
ans=[0]*2*n
print(s,t)
for i,j in zip(s,t):
  print(i,end="")
  print(j,end="")

Fixed code:
n=int(input())
s=list(input())
s,t=s[:n],s[n+1:]
ans=[0]*2*n
for i,j in zip(s,t):
  print(i,end="")
  print(j,end="")
Buggy code:
n = int(input())

word_list = list(map(str, input().split()))

result_string = ""
for num in range(len(word_list[0])):
    for i in range(0,n):
        word_selected = word_list[i]
        result_string += word_selected[num]

print(result_string)

Fixed code:
n = int(input())

word_list = list(map(str, input().split()))

result_string = ""
for num in range(len(word_list[0])):
    for i in range(0,2):
        word_selected = word_list[i]
        result_string += word_selected[num]

print(result_string)
Buggy code:
N=int(input())
a,b=input().split()
a=list(a)
b=list(b)
ab=""
for _ in range(N):
	ab+=a.pop()+b.pop()
print(ab)

Fixed code:
N=int(input())
a,b=input().split()
a=list(a)
b=list(b)
ab=""
for _ in range(N):
	ab+=a.pop(0)+b.pop(0)
print(ab)
Buggy code:
N=int(input())
S,T=input().split("")
P=""
for i in range(N):
  P=P+S[i]+T[i]
print(P)

Fixed code:
N=int(input())
S,T=input().split()

ans=""

for i in range(N):
  ans+=S[i]+T[i]
  
print(ans)
Buggy code:
length = int(input())
str1, str2 = input().split(" ")

result = ""
for i in range(len(str1)):
  result += str1[i]
  result += str2[i]
 
return result

Fixed code:
length = int(input())
str1, str2 = input().split(" ")

result = ""
for i in range(len(str1)):
  result += str1[i]
  result += str2[i]
 
print(result)
Buggy code:
num = int(input())

s1,s2 = input().split()

ans = ''

for i in range(num):
	ans = ans + s1[i]
    ans = ans + s2[i]

print(ans)

Fixed code:
num = int(input())
 
s1,s2 = input().split()
 
ans = ''
 
for i in range(num):
	ans = ans + s1[i]
	ans = ans + s2[i]
print(ans)
Buggy code:
n = int(input())
l = list(input().split())
for i in range(n):
  print(l[0][n] + l[1][n])

Fixed code:
n = int(input())
l = list(input().split())
s = ""
for i in range(n):
  s += (l[0][i] + l[1][i])
print(s)
Buggy code:
n = int(input())
l = list(input().split())
s = ""
for i in range(n):
  s += (l[0][n] + l[1][n])
print(s)

Fixed code:
n=int(input())
s=list(input().split())
c=""
for i in range(n):
    c+=s[0][i]+s[1][i]
print(c)
Buggy code:
#https://atcoder.jp/contests/abc148/tasks/abc148_b
N = int(input())
a,b = map(int,input().split())
moji = ""
for i in range(N):
    moji += a[i]+b[i]

print(moji)

Fixed code:
#https://atcoder.jp/contests/abc148/tasks/abc148_b
N = int(input())
a,b = map(str,input().split())
moji = ""
for i in range(N):
    moji += a[i]+b[i]

print(moji)
Buggy code:
def p_b():
    n = int(input())
    s, t = input().split()
    ans = ""
    for i in range(n):
        ans += s[i]
        ans += t[i]
    print(ans)

Fixed code:
def p_b():
    n = int(input())
    s, t = input().split()
    ans = ""
    for i in range(n):
        ans += s[i]
        ans += t[i]
    print(ans)
    
p_b()
Buggy code:
s = int(input())
str1, str2 = [s for s in input().split()]

ans=[]
for i in range(4):
  ans += str1[i]
  ans += str2[i]

  
print(''.join(ans))

Fixed code:
s = int(input())
str1, str2 = [s for s in input().split()]


ans=[]
for i in range(s):
  ans += str1[i]
  ans += str2[i]

  
print(''.join(ans))
Buggy code:
N = int(input())
A,B = input().split()
tmp = [[] for _ in range(N*2)]
print(A)
M = 2*N
for i in range(0,N):
	tmp[2*i]=A[i]
	tmp[2*i+1]=B[i]
ans = "".join(tmp)
print(ans)

Fixed code:
N = int(input())
A,B = input().split()
tmp = [[] for _ in range(N*2)]
M = 2*N
for i in range(0,N):
	tmp[2*i]=A[i]
	tmp[2*i+1]=B[i]
ans = "".join(tmp)
print(ans)
Buggy code:
size = int(input())
a,b = list(map(int,input().split()))
ans = ""
for i in size:
  ans += a[i]
  ans += b[i]
print(ans)

Fixed code:
size = int(input())
a,b = list(map(str,input().split()))
ans = ""
for i in range(size):
  ans += a[i]
  ans += b[i]
print(ans)
Buggy code:
N = int(input())
S, T = list(input().split())
S = list(S)
T = list(T)
for i in range(0,N+1,2):
    S.insert(i+1,T[i-1])
print("".join(S))

Fixed code:
N = int(input())
S, T = list(input().split())
S = list(S)
T = list(T)
j = 0
for i in range(0,N+N,2):
    S.insert(i+1,T[j])
    j +=1
print("".join(S))
Buggy code:
N = int(input())
S,T=input().split()
lists=[]
for i in range(N):
    lists+=S[i]
    lists+=T[i]
print(*lists)


Fixed code:
N = int(input())
S,T=input().split()
lists=[]
for i in range(N):
    lists+=S[i]
    lists+=T[i]
print(*lists,sep="")
Buggy code:
n=int(input())
s,t=input().split()
u=''
for i in range(n):
  u.append(s[i])
  u.append(t[i])
print(u)

Fixed code:
n=int(input())
s,t=input().split()
u=''
for i in range(n):
  u+=s[i]
  u+=t[i]
print(u)
Buggy code:
N=int(input())
S,T=input().split()
for i in range(N):
  print(S[i]T[i],end="")

Fixed code:
N=int(input())
S,T=input().split()
for i in range(N):
  print(S[i],T[i],sep="",end="")
Buggy code:
n = input()
A, B = input().split()
c = ""

for i in range(n):
  c = c+A[i]
  c = c+B[i]

print(c)

Fixed code:
n = int(input())
A, B = input().split()
c = ""

for i in range(n):
  c = c+A[i]
  c = c+B[i]

print(c)
Buggy code:
N = int(input())
S, T = input().split()

result = []
for s, t in S, T:
    result.append(s)
    result.append(t)
    
print(''.join(result))

Fixed code:
N = int(input())
S, T = input().split()

result = []
for s, t in zip(S, T):
    result.append(s)
    result.append(t)
    
print(''.join(result))
Buggy code:
N = int(input())
S = input()
T = input()

S = list(S)
T = list(T)
A = [] 
for i in range(N):
    A.append(S[i])
    A.append(T[i])
print(''.join(A))

Fixed code:
N = int(input())
S,T = input().split()

S = list(S)
T = list(T)
A = []
for i in range(N):
    A.append(S[i])
    A.append(T[i])
print(''.join(A))
Buggy code:
n = int(input())

s,t = input().split()

s = list(s)
t = list(t)
x = []
i=0
j=0
while n > i:
  x.append(s[i])
  i +=1
  x.append(t[j])
  j +=1
print(x)


Fixed code:
n = int(input())

s,t = input().split()

s = list(s)
t = list(t)
x = []
i=0
j=0
while n > i:
  x.append(s[i])
  i +=1
  x.append(t[j])
  j +=1
print("".join(x))
Buggy code:

N=input()
S=input()
T=input()

strings=[]
for i in range(int(N)):
    strings.append(S[i]+T[i])
    
print(''.join(strings))

Fixed code:
N=input()
S,T=input().split()
strings=[]
for i in range(int(N)):
    strings.append(S[i]+T[i])
print(''.join(strings))
Buggy code:
a,b = input().split()
ans = ''
for i, s in enumerate(a):
  ans+=s
  ans+=b[i]
print(ans)

Fixed code:
_ = input()
a,b = input().split()
ans = ''
for i, s in enumerate(a):
  ans+=s
  ans+=b[i]
print(ans)
Buggy code:
N=int(input())
S,T=map(str,input().split())
list=[]
ans=''

for i in range(N):
  for j in range(N):
    list.append(S[i])
    list.append(T[i])
for x in list:
  ans += x
print(ans)

Fixed code:
N=int(input())
S,T=map(str,input().split())
list=[]
ans=''

for i in range(N):
    list.append(S[i])
    list.append(T[i])
for x in list:
  ans += x
print(ans)
Buggy code:
def ii():return int(input())
def iim():return map(int,input().split())
def iil():return list(map(int,input().split()))
def ism():return map(str,input().split())
def isl():return list(map(str,input().split()))

n = ii()
s,t = ism()
ans = ''
for i in range(n):
    ans += (s[i]+t[i])

Fixed code:
def ii():return int(input())
def iim():return map(int,input().split())
def iil():return list(map(int,input().split()))
def ism():return map(str,input().split())
def isl():return list(map(str,input().split()))

n = ii()
s,t = ism()
ans = ''
for i in range(n):
    ans += (s[i]+t[i])
print(ans)
Buggy code:
N = int(input())
S, T = input().split()
k = S[0]+T[0]
for i in range(1,N-1):
  k += S[i] + T[i]
print(k)

Fixed code:
N = int(input())
S, T = input().split()
k = S[0]+T[0]
for i in range(1,N):
  k += S[i] + T[i]
print(k)
Buggy code:
n = int(input())
s,t = input().split()
 
for i in range(n):
    u = u + s[i] + t[i]
 
print(u)

Fixed code:
n = int(input())
s,t = input().split()
u = ""
for i in range(n):
    u = u + s[i] + t[i] 
print(u)
Buggy code:
N=int(input())
S,T=map(str,input().split())
X=[0]*N
for i in range(N):
  X[i]=S[i]+T[i]
print(" ".join(X))

Fixed code:
N=int(input())
S,T=map(str,input().split())
X=[0]*N
for i in range(N):
  X[i]=S[i]+T[i]
print("".join([str(i) for i in X]))
Buggy code:
N = int(input())
S,T = input().split()
S = list(S)
T = list(T)
ans = []
for s,t in S,T:
  ans.append(s)
  ans.append(t)
print(''.join(ans))

Fixed code:
N = int(input())
S,T = input().split()
S = list(S)
T = list(T)
ans = []
for s,t in zip(S,T):
  ans.append(s)
  ans.append(t)
print(''.join(ans))
Buggy code:
n=int(input())
a,b=[s for s in input().split()]
c=None
for i in range(n):
  c=c+a[i]+b[i]
  
print(c)  

Fixed code:
n=int(input())
a,b=[s for s in input().split()]
c=''
for i in range(n):
  c=c+a[i]+b[i]
  
print(c)
Buggy code:
n = int(input())
s, t = map(str,input())

ans = ''
for i in range(n):
    ans += s[i]
    ans += t[i]

print(ans)

Fixed code:
n = int(input())
s, t = map(str,input().split())

ans = ''
for i in range(n):
    ans += s[i]
    ans += t[i]

print(ans)
Buggy code:
n=int(input())
s=input()
t=input()
i=0
while i<n:
    print(s[i]+t[i],end="")
    i+=1

Fixed code:
n=int(input())
s,t=input().split()
i=0
while i<n:
    print(s[i]+t[i],end="")
    i+=1
Buggy code:
N = int(input())
S, T  = input().split()

for i in range(N):
    r += S[i] + T[i]
    
print(r)


Fixed code:
N = int(input())
S, T  = input().split()
r = ''

for i in range(N):
    r += S[i] + T[i]

print(r)
Buggy code:
input()
a,b = input().split()
a = list(a)
b = list(b)
c = []
i = 0
for _ in a:
  c.append(a[i])
  c.append(b[i])
  i =+ 1
print(''.join(c))

Fixed code:
input()
a,b = input().split()
a = list(a)
b = list(b)
c = []
i = 0
for _ in a:
  c.append(a[i])
  c.append(b[i])
  i += 1
print(''.join(c))
Buggy code:
n=int(input())
s,t=input()split()

print(*[s+t for i in zip(s,t)],sep="")

Fixed code:
n=int(input())
s,t=input().split()

print(*[i+j for i,j in zip(s,t)],sep="")
Buggy code:
a=int(input())
s,t=[x for x in input().rstrip().split()]
print(s,t)
ans=""
for i in range(a):
    ans+=s[i]
    ans+=t[i]
print(ans)

Fixed code:
a=int(input())
s,t=[x for x in input().rstrip().split()]

ans=""
for i in range(a):
    ans+=s[i]
    ans+=t[i]
print(ans)
Buggy code:
n = input()
s, t = input().split()
ans = ''
for i in range(n):
  ans += s[i] + t[i]
print(ans)

Fixed code:
n = int(input())
s, t = input().split()

ans = ""
for i in range(n):
    ans += s[i]
    ans += t[i]

print(ans)
Buggy code:
n=int(input())
s,t=map(int,input().split())
j=0
k=0
r=[0 for i in range(2*n)]
for i in range(0,2*n,2):
  r[i]=s[j]
  j+=1
  
for i in range(1,2*n+1,2):
  r[i]=t[k]
  k+=1
  
print("".join(r))

Fixed code:
n=int(input())
s,t=map(str,input().split())
j=0
k=0
r=[0 for i in range(2*n)]
for i in range(0,2*n,2):
  r[i]=s[j]
  j+=1
  
for i in range(1,2*n+1,2):
  r[i]=t[k]
  k+=1
  
print("".join(r))
Buggy code:
n=int(input())
a,b=input().split()
str=""
for i in range(n):
  str+=a[i]+b[i]
  
 print(str)

Fixed code:
n=int(input())
a,b=input().split()
str=""
for i in range(n):
    str+=a[i]+b[i]
print(str)
Buggy code:
number = int(input())
word1, word2 = input().split()
moji = ''

word1 = list(word1)
word2 = list(word2)

newword = []

print(word1, word2)

for i in range(number):
    newword.append(word1[i])
    newword.append(word2[i])

print(newword)

moji = ''.join(newword)

print(moji)

Fixed code:
number = int(input())
word1, word2 = input().split()
moji = ''

word1 = list(word1)
word2 = list(word2)

newword = []

for i in range(number):
    newword.append(word1[i])
    newword.append(word2[i])

moji = ''.join(newword)

print(moji)
Buggy code:
N = int(input())
Ar =list(map(str,input().split))

S = list(Ar[0])
T = list(Ar[1])

Ans_Ar = []

for i in range(N):
  Ans_Ar.append(S[i])
  Ans_Ar.append(T[i])

result = ''.join(Ans_Ar)
print(result)

Fixed code:
N = int(input())
Ar =list(map(str,input().split()))

S = list(Ar[0])
T = list(Ar[1])

Ans_Ar = []

for i in range(N):
  Ans_Ar.append(S[i])
  Ans_Ar.append(T[i])

result = ''.join(Ans_Ar)
print(result)
Buggy code:
N = int(input())
S, T = map(str, input().split())
S = S.split('')
T = T.split('')

for i in range(N):
  ans = []
  ans.append(S[i])
  ans.append(T[i])
print(''.join(ans))

Fixed code:
N = int(input())
S, T = map(str, input().split())
S = list(S)
T = list(T)

for i in range(N):
  ans = []
  for j in range(N):
    ans.append(S[j])
    ans.append(T[j])
print(''.join(ans))
Buggy code:
n = int(input)
s,t = map(str,input().split())

for i in range(n):
    print(s[i]+t[i],end="")

Fixed code:
n = int(input())
s,t = map(str,input().split())

for i in range(n):
    print(s[i]+t[i],end="")
Buggy code:
N=int(input())
S,T=map(input().split())
a=""
for i in range(N):
  a+=S[i]+T[i]
print(a)

Fixed code:
N=int(input())
S,T=map(str,input().split())
a=""
for i in range(N):
  a+=S[i]+T[i]
print(a)
Buggy code:
N = int(input())
words = input()
word = words.split(' ')
new_word = []

for i in range(2 * N):
    if i % 2 == 0:
        new_word.append(word[0][i//2])
    else:
        new_word.append(word[1][i//2])
    
print(new_word)

Fixed code:
N = int(input())
words = input()
word = words.split(' ')
new_word = []

for i in range(2 * N):
    if i % 2 == 0:
        new_word.append(word[0][i//2])
    else:
        new_word.append(word[1][i//2])
    
print("".join(new_word))
Buggy code:
N = int(input())
S,T = input().split

l = []
for i in range(N):
  l.append(S[i])
  l.append(T[i])
  
print("".join(l))

Fixed code:
N = int(input())
S,T = input().split()

l = []
for i in range(N):
    l.append(S[i])
    l.append(T[i])

print("".join(l))
Buggy code:
def f03():
    n=int(input())
    s, t=map(str, input().split())
    print(*[s[i]+t[i] for i in range(n)], seq='')
f03()

Fixed code:
def f03():
    n=int(input())
    s, t=map(str, input().split())
    print(*[s[i]+t[i] for i in range(n)], sep='')
f03()
Buggy code:
N=int(input())
S,T=map(str,input().split())
S,T=list(S),list(T)
print(S[2])
x=list("a"*(N*2))
for i in range(0,N*2):
    if i%2==0:
        x[i]=S[i//2]
    else:
        x[i]=T[i//2]
x="".join(x)
print(x)


Fixed code:
N=int(input())
S,T=map(str,input().split())
S,T=list(S),list(T)
x=list("a"*(N*2))
for i in range(0,N*2):
    if i%2==0:
        x[i]=S[i//2]
    else:
        x[i]=T[i//2]
x="".join(x)
print(x)
Buggy code:
N = int(input())
Str_input = str(input())
S = Str_input.split()[0]
T = Str_input.split()[1]
ans = ''
for i in range(N):
    ans = ans + S[i:i+1] + T[i:i+1]
ans

Fixed code:
N = int(input())
Str_input = str(input())
S = Str_input.split()[0]
T = Str_input.split()[1]
ans = ''
for i in range(N):
    ans = ans + S[i:i+1] + T[i:i+1]
print(ans)
Buggy code:
n = int(input()) 
s, t = list(map(str, input().split()))

ans = ''
for ss, tt in zip(s, t):
    ans += ss + tt

Fixed code:
n = int(input()) 
s, t = list(map(str, input().split()))

ans = ''
for ss, tt in zip(s, t):
    ans += ss + tt
    
print(ans)
Buggy code:
n=int(input())
s,t=map(str,input().split())
ans=""
for i in range(n)
	ans+=s[i]+t[i]
print(ans)


Fixed code:
n=int(input())
s,t=map(str,input().split())
ans=""
for i in range(n):
	ans+=s[i]+t[i]
print(ans)
Buggy code:
# -*- coding:utf-8 -*-
N=int(input())
S,T=map(str,input().split())
for i in range(N):
    ans=ans+S[i]+T[i]
print(ans)

Fixed code:
# -*- coding:utf-8 -*-
N=int(input())
S,T=map(str,input().split())
ans=""
for i in range(N):
    ans=ans+S[i]+T[i]
print(ans)
Buggy code:
n = int(input())
s,t = input().split()
s = str(s.lower())
t = str(t.lower())
if len(s) == n and len(t) == n:
    new_list = []
    for item in range(len(s)):
        new_list.append(s[item])
        new_list.append(t[item])

    print(new_list)
else:
    pass


Fixed code:

n = int(input())
s,t = input().split()
s = str(s.lower())
t = str(t.lower())
if len(s) == n and len(t) == n:
    new_list = []
    for item in range(len(s)):
        new_list.append(s[item])
        new_list.append(t[item])

    print(''.join(new_list))
else:
    pass
Buggy code:
n = int(input())
line = input().split(" ")

s = line[0]
t = line[1]

for i in range(0, len(s)) 
	print(s[i], end="")
  	print(t[i], end="")


Fixed code:
n = int(input())
line = input().split(" ")
 
s = line[0]
t = line[1]
 
for i in range(0, len(s)): 
  print(s[i], end="")
  print(t[i], end="")
Buggy code:
n = int(input())
s, t = map(str, input().split())
x= []

for i in range(n):

    lst = [s[i], t[i]]
    x.append(''.join(lst))

Fixed code:
n = int(input())
s, t = map(str, input().split())
x= []

for i in range(n):

    lst = [s[i], t[i]]
    x.append(''.join(lst))

print(''.join(x))
Buggy code:
N = int(input())
S, T  = input().split()

S_list = list(S)
T_list = list(T)
U_list = []
for i in range(N):
    U_list.append(S_list[i])
    U_list.append(T_list[i])
print(U_list)

U = ''.join(U_list)
print(U)

Fixed code:
N = int(input())
S, T  = input().split()

S_list = list(S)
T_list = list(T)
U_list = []
for i in range(N):
    U_list.append(S_list[i])
    U_list.append(T_list[i])

U = ''.join(U_list)
print(U)
Buggy code:
n = int(input())
k = input().split()
c = ""
for i in list(range(2)):
  c += k[0][i]
  c += k[1][i]
  
print(c)

Fixed code:
n = int(input())
k = input().split()
c = ""
for i in list(range(n)):
  c += k[0][i]
  c += k[1][i]
  
print(c)
Buggy code:
n = input()
a, b = input().split(" ")
output = ""
print(a, b)
for s, t in zip(a, b):
    output += s
    output += t
print(output)

Fixed code:
n = input()
a, b = input().split(" ")
output = ""
for s, t in zip(a, b):
    output += s
    output += t
print(output)
Buggy code:
# -*- coding: utf-8 -*-
N=int(input())
S, T=map(list, input().split())
W=""
for i in range(N):
    W=W+S[i-1]
    W=W+T[i-1]


print(W)

Fixed code:
# -*- coding: utf-8 -*-
N=int(input())
S, T=map(list, input().split())
W=""
for i in range(N):
    W=W+S[i]
    W=W+T[i]

print(W)
Buggy code:
n = int(input())
a,b = input().split()
a = [i for i in a]
b = [i for i in b]
ans =""

for i in range(n):
  ans += a[n]
  ans += b[n]
print(ans)


Fixed code:
n = int(input())
a,b = input().split()
a = list(a)
b = list(b)
ans =""
 
for i in range(n):
  ans += a[i]
  ans += b[i]
print(ans)
Buggy code:
N = int(input())
S  = input().split()
print(len(S))
for i in range(N):
    print(S[0][i], end="")
    print(S[1][i], end="")


Fixed code:
N = int(input())
S  = input().split()
for i in range(N):
    print(S[0][i], end="")
    print(S[1][i], end="")
Buggy code:
n = int(input())
l, r = input().split()

print(l)

s = ''
for i in range(len(r)):
  s += l[i]
  s += r[i]
  
print(s)

Fixed code:
n = int(input())
l, r = input().split()

s = ''
for i in range(len(r)):
  s += l[i]
  s += r[i]
  
print(s)
Buggy code:
n=int(input)
s,t=input().split()
ans=''
for i in range(n):
  ans +=s[i]
  ans +=t[i]
print(ans)

Fixed code:
n = int(input())
s, t = input().split()

ss = ''

for i in range(n):
    ss += s[i]
    ss += t[i]
    
print(ss)
Buggy code:
n = int(input())
s, t = input().split()

ss, tt=list(s), list(t)
print(ss, tt)

o = str()
for i in range(len(ss)):
    o += ss[i] + tt[i]
    
print(o)


Fixed code:
n = int(input())
s, t = input().split()

ss, tt=list(s), list(t)

o = str()
for i in range(len(ss)):
    o += ss[i] + tt[i]
    
print(o)
Buggy code:
a=int(input())
b,c=list(input().split())
ans=[]
for i in range(a):
    print(i)
    ans.append(b[i])
    ans.append(c[i])
sinans="".join(ans)
print(sinans)

Fixed code:
a=int(input())
b,c=list(input().split())
ans=[]
for i in range(a):
    ans.append(b[i])
    ans.append(c[i])
sinans="".join(ans)
print(sinans)
Buggy code:
n = int(input())
s,t = map(str,input().split())

ans =str()
for i in range(n):
    ans += s[i]
    ans += s[i]
print(ans)

Fixed code:
n = int(input())
s,t = map(str, input().split())
ans = ''
for i in range(n):
    ans += s[i]
    ans += t[i]
print(ans)
Buggy code:
N=int(input())
S,T=map(str,input().split())
a=()
for i in range(N):
  a+=S[i]
  a+=T[i]
print(a)
  
  

Fixed code:
N=int(input())
S,T=map(str,input().split())
a=str()
for i in range(N):
  a+=S[i]
  a+=T[i]
print(a)