qyliang/CodeNanoFix huggingface dataset:
Buggy code:
from bisect import bisect
S=input()
T=input()
c=[[] for _ in range(26)]
for i,s in enumerate(S):
    j=ord(s)-ord("a")
    c[j].append(i)
for t in set(T):
    if not c[ord(t)-ord("a")]:
        print(-1)
        exit()
rnd=0
k=-1
for t in T:
    ti=ord(t)-ord("a")
    i=bisect(c[ti],k)
    print(ti,i)
    if i==len(c[ti]):
        k=c[ti][0]
        rnd+=1
    else:
        k=c[ti][i]

print(c)

print(rnd*len(S)+k+1)


Fixed code:
from bisect import bisect
S = input()
T = input()

cs = [[] for i in range(26)]
for i,s in enumerate(S):
    j = ord(s) - ord('a')
    cs[j].append(i)

for c in set(T):
    if not cs[ord(c) - ord('a')]:
        print(-1)
        exit()

rnd = 0
k = -1
for t in T:
    ti = ord(t) - ord('a')
    i = bisect(cs[ti], k)
    if i == len(cs[ti]):
        k = cs[ti][0]
        rnd += 1
    else:
        k = cs[ti][i]

print(rnd*len(S) + k + 1)
Buggy code:
s = input()

i = 0
lst = []
for j in range(1,len(s)+1):
    if lst[-1] != s[i:j]:
        lst.append(s[i:j])
        i = j

print(len(lst))

Fixed code:
s = input()

i = 0
lst = [""]
for j in range(1,len(s)+1):
    if lst[-1] != s[i:j]:
        lst.append(s[i:j])
        i = j

print(len(lst)-1)
Buggy code:
s=input()
i=1
s0=s[0]
ct=1
while i<len(s)-1:
  print(s0)
  if s0==s[i]:
    s0=s[i:i+2]
    i+=2
  else:
    s0=s[i]
    i+=1
  ct+=1
if i>len(s):
  print(ct)
elif s0==s[i]:
  print(ct)
else:
  print(ct+1)

Fixed code:
s=input()
i=1
s0=s[0]
ct=1
while i<len(s)-1:
  if s0==s[i]:
    s0=s[i:i+2]
    i+=2
  else:
    s0=s[i]
    i+=1
  ct+=1
if i>=len(s):
  print(ct)
elif s0==s[i]:
  print(ct)
else:
  print(ct+1)
Buggy code:
import sys


inint = lambda: int(sys.stdin.readline())
inintm = lambda: map(int, sys.stdin.readline().split())
inintl = lambda: list(inintm())
instrm = lambda: map(str, sys.stdin.readline().split())
instrl = lambda: list(instrm())

s = input()

ans = 0
a = 0
b = 0

for i in range(len(s)):
    a += s[i]
    if a == b:
        continue
    ans += 1
    b = a
    a = ""

print(ans)

Fixed code:
import sys


inint = lambda: int(sys.stdin.readline())
inintm = lambda: map(int, sys.stdin.readline().split())
inintl = lambda: list(inintm())
instrm = lambda: map(str, sys.stdin.readline().split())
instrl = lambda: list(instrm())

s = input()

ans = 0
a = ""
b = ""

for i in range(len(s)):
    a += s[i]
    if a == b:
        continue
    ans += 1
    b = a
    a = ""

print(ans)
Buggy code:
S = input()

res = 0
tmp = ""
last = ""

for s in S:
    tmp += s
    if tmp == last:
        continue

    print(tmp)
    last = tmp
    tmp = ""
    res += 1

print(res)

Fixed code:
S = input()

res = 0
tmp = ""
last = ""

for s in S:
    tmp += s
    if tmp == last:
        continue

    last = tmp
    tmp = ""
    res += 1

print(res)
Buggy code:
s = input()

now = s[0]
print(now)
cnt = 1
i = 1
while True:
    if s[i] != now:
        cnt += 1
        now = s[i]
        i += 1
    else:
        now = now + s[i]
        cnt += 1
        i += 2
        if i > len(s)-1:
            cnt -= 1
    if i >= len(s):
        break
print(cnt)

Fixed code:
s = input()

if len(s) == 1:
    print(1)
    exit()


now = s[0]
cnt = 1
i = 1
while True:
    if s[i] != now:
        cnt += 1
        now = s[i]
        i += 1
    else:
        now = now + s[i]
        cnt += 1
        i += 2
        if i > len(s):
            cnt -= 1
    if i >= len(s):
        break
print(cnt)
Buggy code:
s = list(input())
cnt, i = 0, 0
l = len(s)

while i < l:
    if s[i] == s[i+1]:
        cnt += 1
        i += 2
    i += 1

print(l-cnt)

Fixed code:
s = list(input())
cnt, i = 0, 1
l = len(s)

while i < l:
    if s[i] == s[i-1]:
        cnt += 1
        i += 2
    i += 1

print(l-cnt)
Buggy code:
from collections import defaultdict
 
def readInt():
	return int(input())
def readInts():
	return list(map(int, input().split()))
def readChar():
	return input()
def readChars():
	return input().split()
 
s = readChar()
if len(s)==1:
	print(1)
	exit()
b="-1"
ans=0
l = [""]
while len(s)>1:
	if l[-1]!=s[:1]:
		l.append(s[:1])
		s = s[1:]
	else:
		l.append(s[:2])
		s = s[2:]
if s!="":
	l.append(s)
del l[0]

print(l)
if l[-1]==l[-2]:
	del l[-1]

print(len(l))

Fixed code:
from collections import defaultdict
 
def readInt():
	return int(input())
def readInts():
	return list(map(int, input().split()))
def readChar():
	return input()
def readChars():
	return input().split()
 
s = readChar()
if len(s)==1:
	print(1)
	exit()
b="-1"
ans=0
l = [""]
while len(s)>1:
	if l[-1]!=s[:1]:
		l.append(s[:1])
		s = s[1:]
	else:
		l.append(s[:2])
		s = s[2:]
if s!="":
	l.append(s)
del l[0]

#print(l)
if l[-1]==l[-2]:
	del l[-1]

print(len(l))
Buggy code:
#!/usr/bin/env python
# coding: utf-8

# In[12]:


S = input()


# In[16]:


length = len(S)
if length == 1:
    print(1)
elif length == 2:
    if S[0] == S[1]:
        print(1)
    else:
        print(2)
else:
    dp = [0]*length
    dp[0] = 1
    if S[0] == S[1]:
        dp[1] = 1
    else:
        dp[1] = 2
    if S[0] != S[1] and S[1] != S[2]:
        dp[2] = 3
    else:
        dp[2] = 2

    for i in range(3, length):
        print(dp)
        if S[i-1] == S[i]:
            dp[i] = dp[i-3] + 2
        else:
            dp[i] = dp[i-1] + 1
    print(dp[-1])


# In[5]:





# In[ ]:






Fixed code:
#!/usr/bin/env python
# coding: utf-8

# In[12]:


S = input()


# In[17]:


length = len(S)
if length == 1:
    print(1)
elif length == 2:
    if S[0] == S[1]:
        print(1)
    else:
        print(2)
else:
    dp = [0]*length
    dp[0] = 1
    if S[0] == S[1]:
        dp[1] = 1
    else:
        dp[1] = 2
    if S[0] != S[1] and S[1] != S[2]:
        dp[2] = 3
    else:
        dp[2] = 2

    for i in range(3, length):
#         print(dp)
        if S[i-1] == S[i]:
            dp[i] = dp[i-3] + 2
        else:
            dp[i] = dp[i-1] + 1
    print(dp[-1])


# In[5]:





# In[ ]:
Buggy code:
s=input()
c=0
s2=""
s3=""
for i in s:
 s3+=i
 if s2!=s3:
  c+=1
  s2+=s3
  s3=""
print(c)

Fixed code:
s=input()
c=0
s2=""
s3=""
for i in s:
 s3+=i
 if s2!=s3:
  c+=1
  s2=s3
  s3=""
print(c)
Buggy code:
s=str(input())
s=list(s)
ans=1
i=1
temp=s[0]
while True:
  if s[i]!=temp:
    ans=ans+1
    temp=s[i]
    i=i+1
  else:
    temp=s[i]+s[i+1]
    i=i+2
    ans=ans+1
  if i>len(s)-1:
    break
print(ans)

Fixed code:
s=str(input())
s=list(s)
ans=1
i=1
temp=s[0]
while True:
  if s[i]!=temp:
    ans=ans+1
    temp=s[i]
    i=i+1
  elif s[i]==temp and i==len(s)-1:
    i=i+1
  else:
    temp=s[i]+s[i+1]
    i=i+2
    ans=ans+1
  if i>len(s)-1:
    break
print(ans)
Buggy code:
S = list(input())
s = 0
num = 0
ans = 0
for i in range(len(S)):
    if i < num:
        continue
    for j in range(1,len(S)-i):
        if S[i:i+j] != s:
            s = S[i:i+j]
            num = i+j
            ans += 1
            break
print(ans+1)

Fixed code:
S = list(input())
s = 0
num = 0
ans = 0
for i in range(len(S)):
    if i < num:
        continue
    for j in range(1,len(S)-i+1):
        if S[i:i+j] != s:
            s = S[i:i+j]
            num = i+j
            ans += 1
            break
print(ans)
Buggy code:
s = input()

dp = [[[0, ' '], [0, '  ']], [[1, s[1]], [1, ' '+s[1]]]]
for i in range(1, len(s)):
    if s[i-1:i+1] == dp[-2][1][1]:
        ndp1 = [dp[-2][0][0]+1, s[i-1:i+1]]
    else:
        ndp1 = [max(dp[-2][0][0], dp[-2][1][0])+1, s[i-1:i+1]]
    if s[i] == dp[-1][0][1]:
        ndp0 = [dp[-1][1][0]+1, s[i]]
    else:
        ndp0 = [max(dp[-1][0][0], dp[-1][1][0])+1, s[i]]
    dp.append([ndp0, ndp1])

print(max(dp[len(s)][0][0], dp[len(s)][1][0]))

Fixed code:
s = input()

dp = [[[0, ''], [0, '']], [[1, s[0]], [-10**6, '']]]
for i in range(1, len(s)):
    if s[i-1:i+1] == dp[-2][1][1]:
        ndp1 = [dp[-2][0][0]+1, s[i-1:i+1]]
    else:
        ndp1 = [max(dp[-2][0][0], dp[-2][1][0])+1, s[i-1:i+1]]
    if s[i] == dp[-1][0][1]:
        ndp0 = [dp[-1][1][0]+1, s[i]]
    else:
        ndp0 = [max(dp[-1][0][0], dp[-1][1][0])+1, s[i]]
    dp.append([ndp0, ndp1])

print(max(dp[len(s)][0][0], dp[len(s)][1][0]))
Buggy code:
S = input()
d1 = ""
d2 = ""
res = 0
for i in range(len(S)):
  d1 += s[i]
  if d1 != d2:
    d2 = d1
    d1 = ""
    res += 1
print(res)

Fixed code:
S = input()
d1 = ""
d2 = ""
res = 0
for i in range(len(S)):
  d1 += S[i]
  if d1 != d2:
    d2 = d1
    d1 = ""
    res += 1
print(res)
Buggy code:
ans=0
S=T=''
for i in input():
    S+=i
    if S!=T:
        ans+=1
        print(S)
        S,T='',S
print(ans)

Fixed code:
ans=0
S=T=''
for i in input():
    S+=i
    if S!=T:
        ans+=1
        S,T='',S
print(ans)
Buggy code:
s = list(input())

g = []

g.append(0)
g.append(1)
if s[1] == s[2]:
    g.append(1)
else:
    g.append(2)

for i in range(3,len(s)+1):
    if s[i-1] != s[i-2]:
        g.append(g[i-1]+1)
    else:
        g.append(g[i-3]+2)

print(g[-1])

Fixed code:
s = list(input())

g = []

g.append(0)
g.append(1)
if len(s) > 1:
    if s[0] == s[1]:
        g.append(1)
    else:
        g.append(2)

    for i in range(3,len(s)+1):
        if s[i-1] != s[i-2]:
            g.append(g[i-1]+1)
        else:
            g.append(g[i-3]+2)

print(g[len(s)])
Buggy code:
S = input()

count = 1
sentence = S[0]
i=1

while i < len(S):
    print(sentence, S[i], count)
    if sentence != S[i]:
        sentence = S[i]
        count += 1
        i+=1
    elif i==len(S)-1:
        break
    else:
        count += 1
        sentence = S[i:i+2]
        i+=2

print(count)



Fixed code:
S = input()

count = 1
sentence = S[0]
i=1

while i < len(S):
    if sentence != S[i]:
        sentence = S[i]
        count += 1
        i+=1
    elif i==len(S)-1:
        break
    else:
        count += 1
        sentence = S[i:i+2]
        i+=2

print(count)
Buggy code:
s = input()
n = len(s)

bef = s[0]
key = 0
ans = 1
for i in range(1, n):
  if key == i:
    continue
  if bef == s[i]:
    if i == n-1:
      continue
    bef = s[i+1]
    ans += 1
    key = i+1
  else:
    bef = s[i]
    ans += 1
print(ans)

Fixed code:
s = input()
n = len(s)

bef = s[0]
key = 0
ans = 1
for i in range(1, n):
  if key == i:
    continue
  if bef == s[i]:
    if i == n-1:
      continue
    bef = s[i:i+2]
    ans += 1
    key = i+1
  else:
    bef = s[i]
    ans += 1
print(ans)
Buggy code:
"""
aabbaa

aa b ba a
a ab b aa
"""
s = list(input())

n = len(s)
hst = []
sk = ""

for i in range(n):
    sk += s[i]
    if i == 0:
        hst.append(sk)
        sk = ""
    elif hst[-1] != sk:
        hst.append(sk)
        sk = ""

print(hst)
print(len(hst))

Fixed code:
"""
aabbaa

aa b ba a
a ab b aa
"""
s = list(input())

n = len(s)
hst = []
sk = ""

for i in range(n):
    sk += s[i]
    if i == 0:
        hst.append(sk)
        sk = ""
    elif hst[-1] != sk:
        hst.append(sk)
        sk = ""

print(len(hst))
Buggy code:
s=input()
n=len(s)
l=[]
l.append(s[0])
i=1
k=0
while i < n:
    j=1
    if i==n-1 and s[n-2]==s[n-1]:
        break
    while l[k] == s[i:i+j]:
        j += 1

    l.append(s[i:i+j])
    i += j
    k += 1

Fixed code:
s=input()
n=len(s)
l=[]
l.append(s[0])
i=1
k=0
while i < n:
    j=1

    if i==n-1 and l[k]==s[n-1]:
        break
    while l[k] == s[i:i+j]:
        j += 1

    l.append(s[i:i+j])
    i += j
    k += 1


print(k+1)
Buggy code:
S = input()
N = len(S)
count = 0
i = 0
last = ""

while i < N:
    if i == 0:
        last = S[i]
        i += 1
        count += 1
    elif i != 0 and last == S[i]:
        if i > N-2:
            break
        last = S[i:i+2]
        i += 2
        count += 1
    elif i != 0 and last != S[i]:
        last = S[i]
        i += 1
        count += 1
    print(i)
    print(last)
if i == N-1 and last != S[N-1]:
    count += 1
print(count)


Fixed code:
S = input()
N = len(S)
count = 0
i = 0
last = ""

while i < N:
    if i == 0:
        last = S[i]
        i += 1
        count += 1
    elif i != 0 and last == S[i]:
        if i > N-2:
            break
        last = S[i:i+2]
        i += 2
        count += 1
    elif i != 0 and last != S[i]:
        last = S[i]
        i += 1
        count += 1

if i == N-1 and last != S[N-1]:
    count += 1
print(count)
Buggy code:
S = input()
count = 1
i = 0
initial_length = len(S)-1
l = S[0]
S = S + '&' + '%'
print(S)
while i < initial_length:
    if l == S[i+1]:
        if i == initial_length-1:
            break
        elif S[i+2] == S[i+3]:
            l = S[i+3]
            i += 3
            count += 1
        else:
            l = S[i+1:i+3]
            i += 2
    else:
        l = S[i+1]
        i += 1
    count += 1
print(count)

Fixed code:
S = input()
count = 1
i = 0
initial_length = len(S)-1
l = S[0]
S = S + '&' + '%'
while i < initial_length:
    if l == S[i+1]:
        if i == initial_length-1:
            break
        elif S[i+2] == S[i+3]:
            l = S[i+3]
            i += 3
            count += 1
        else:
            l = S[i+1:i+3]
            i += 2
    else:
        l = S[i+1]
        i += 1
    count += 1
print(count)
Buggy code:
s=list(input())
cnt=0
now=''
for i in range(len(s)):
    now+=s[i]
    if buf!=now:
        buf=now
        now=''
        cnt+=1
print(cnt)


Fixed code:
s=list(input())
cnt=0
now=''
buf=''
for i in range(len(s)):
    now+=s[i]
    if buf!=now:
        buf=now
        now=''
        cnt+=1
print(cnt)
Buggy code:
from sys import stdin

s = stdin.readline().rstrip()
N = len(s)

if N == 1:
    print(1)
    exit()
elif N == 2:
    if s[0] == s[1]:
        print(1)
        exit()
    else:
        print(2)
        exit()

dp = [0]*N
if s[0] == s[1]:
    dp[0] = 0
    dp[1] = 1
else:
    dp[0] = 1
    dp[1] = 2
for i in range(2,N):
    if s[i] == s[i-1]:
        dp[i] = dp[i-3] + 2
    else:
        dp[i] = dp[i-1] + 1

print(dp[N-1]+1)

Fixed code:
from sys import stdin

s = stdin.readline().rstrip()
N = len(s)

if N == 1:
    print(1)
    exit()
elif N == 2:
    if s[0] == s[1]:
        print(1)
        exit()
    else:
        print(2)
        exit()

dp = [0]*N
dp[0] = 1
if s[0] == s[1]:
    dp[1] = 1
else:
    dp[1] = 2
for i in range(2,N):
    if s[i] == s[i-1]:
        dp[i] = dp[i-3] + 2
    else:
        dp[i] = dp[i-1] + 1

print(dp[N-1])
Buggy code:
S = input()
ans = ["-1"]
t = ""
for c in S:
    t += c
    if t != ans[-1]:
        ans.append(t)
        t = ""
print(ans)
print(len(ans)-1)

Fixed code:
S = input()
ans = ["-1"]
t = ""
for c in S:
    t += c
    if t != ans[-1]:
        ans.append(t)
        t = ""
print(len(ans)-1)
Buggy code:
s = list(input())
if len(s) == 1:
    print(1)
    exit()
elif len(s) == 2:
    if s[0] == s[1]:
        print(1)
    else:
        print(2)
    exit()
else:
    dp = [0]*len(s)
    if s[0]==s[1] and s[1]==s[2]:
        dp[0:3]=[1,2,2]
    elif s[0]==s[1] and s[1]!=s[2]:
        dp[0:3]=[1,1,2]
    elif s[0]!=s[1] and s[1]==s[2]:
        dp[0:3]=[1,2,2]
    else:
        dp[0:3]=[1,2,3]

for i in range(3, len(s)):
    if s[i] != s[i-1]:
        dp[i] += dp[i-1]+1
    else:
        dp[i] += dp[i-3]+2

print(dp[-1])

Fixed code:
s=input()
n=len(s)
dp=[0]*(n)
dp[0]=1
if n==1:
    print(1)
    exit()
if n==2:
    if s[0]==s[1]:
        print(1)
    else:
        print(2)
    exit()
if s[0]==s[1]:
    dp[1]=1
else:
    dp[1]=2
if s[0]!=s[1] and s[1]!=s[2]:
    dp[2]=3
else:
    dp[2]=2
for i in range(3,n):
    if s[i]!=s[i-1]:
        dp[i]=dp[i-1]+1
    else:
        dp[i]=dp[i-3]+2
print(dp[n-1])
Buggy code:
s=input()
n=len(s)
ans=0
while s:
  if len(s)==n:
    si=s[0]
    s=s[1:]
  else:
    if si==s[0]:
      if len(s)==1:
        break
      else:
        si=s[:2]
        s=s[2:]
    else:
      si=s[0]
      s=s[1:]
print(ans)

Fixed code:
s=input()
n=len(s)
ans=0
while s:
  if len(s)==n:
    si=s[0]
    s=s[1:]
  else:
    if si==s[0]:
      if len(s)==1:
        break
      else:
        si=s[:2]
        s=s[2:]
    else:
      si=s[0]
      s=s[1:]
  ans+=1
print(ans)
Buggy code:
S = list(input())
l = [S.pop()]

while S:
    if S[-1] != l[-1]:
        l.append(S.pop())
    else:
        if len(S) == 1:
            break
        else:
            a = S.pop()
            b = S.pop()
            l.append(b + a)
    print(l)

print(len(l))

Fixed code:
S = list(input())
l = [S.pop()]

while S:
    if S[-1] != l[-1]:
        l.append(S.pop())
    else:
        if len(S) == 1:
            break
        else:
            a = S.pop()
            b = S.pop()
            l.append(b + a)

print(len(l))
Buggy code:
s = str(input())
num = len(s)
dp = [[0,0] for i in range(n+1)]
for i in range(n):
  for j in [1,2]:
    for k in [1,2]:
      if i + k <= n:
        a = s[i-j:i]
        b = s[i:i+k]
        if a != b:
          dp[i+k][k-1] = max(dp[i+k][k-1],dp[i][j-1]+1)
print(max(dp[n]))

Fixed code:
s = str(input())
n = len(s)
dp = [[0,0] for i in range(n+1)]
for i in range(n):
  for j in [1,2]:
    for k in [1,2]:
      if i + k <= n:
        a = s[i-j:i]
        b = s[i:i+k]
        if a != b:
          dp[i+k][k-1] = max(dp[i+k][k-1],dp[i][j-1]+1)
print(max(dp[n]))
Buggy code:
s = input()
a_L = deque([val for val in s])

div_L = [""]
moji = ""

counter = 0

while a_L:
    tmp = a_L.popleft()
    moji += tmp
    if moji !=  div_L[counter]:
        div_L.append(moji)
        moji = ""
        counter += 1

print(len(div_L)-1)


Fixed code:
from collections import deque
s = input()
a_L = deque([val for val in s])

div_L = [""]
moji = ""

counter = 0

while a_L:
    tmp = a_L.popleft()
    moji += tmp
    if moji !=  div_L[counter]:
        div_L.append(moji)
        moji = ""
        counter += 1

print(len(div_L)-1)
Buggy code:
s=list(input())
D=[s[0]]
i=0
while i < len(s) - 1:
  if s[i+1] == D[-1]:
    D.append(s[i+1]+s[i+2])
    i+=2
  else:
    D.append(s[i + 1])
    i+=1

print(len(D)-(1 if i == len(s) else 0))

Fixed code:
s=list(input())
D=[s[0]]
i=0
while i < len(s) - 1:
  if s[i+1] == D[-1]:
    D.append(s[i+1:i+3])
    i+=2
  else:
    D.append(s[i + 1])
    i+=1

print(len(D)-(1 if i == len(s) else 0))
Buggy code:
S = input()
i = 0
parts = [S[0]]
parts_append = parts.append
while i < len(S) - 1:
    print(parts[-1], S[i + 1])
    if S[i + 1] == parts[-1]:
        parts_append(S[i + 1:i + 3])
        i += 2
    else:
        parts_append(S[i + 1])
        i += 1

print(len(parts) - (1 if i == len(S) else 0))

Fixed code:
S = input()
i = 0
parts = [S[0]]
parts_append = parts.append
while i < len(S) - 1:
    if S[i + 1] == parts[-1]:
        parts_append(S[i + 1:i + 3])
        i += 2
    else:
        parts_append(S[i + 1])
        i += 1

print(len(parts) - (1 if i == len(S) else 0))
Buggy code:
s = ''
count = 0
while S:
    if s == S[-1]:
        if len(S) >= 2:
            S.pop()
            S.pop()
            s = ''
            count+=1
        else:
            break        
    else:
        s = S.pop()
        count+=1
        
print(count)

Fixed code:
S = list(input())

s = ''
count = 0
while S:
    if s == S[-1]:
        if len(S) >= 2:
            S.pop()
            S.pop()
            s = ''
            count+=1
        else:
            break        
    else:
        s = S.pop()
        count+=1
        
print(count)
Buggy code:
S=input()
c=len(S)
k=0
cnt=0
t=''
r=''
for i in S:
    t+=i
    if t==k:
        continue
    k==t
    t=''
    cnt+=1
print(cnt)

Fixed code:
S=input()
c=len(S)
k=0
cnt=0
t=''
r=''
for i in S:
    t+=i
    if t==r:
        continue
    r=t
    t=''
    cnt+=1
print(cnt)
Buggy code:
S = input()
ans = 0
Si = ""
now = ""
for s in S:
    now += s
    if Si != now:
        ans += 1
        Si = now
        now = ""

Fixed code:
S = input()
ans = 0
Si = ""
now = ""
for s in S:
    now += s
    if Si != now:
        ans += 1
        Si = now
        now = ""
print(ans)
Buggy code:
S = input()
ans = []
cur = ''


for i in range(len(S)):
    cur += S[i]

    if len(ans) == 0:
        ans.append(cur)
        cur = ''
    else:
        if ans[len(ans)-1] != cur:
            ans.append(cur)
            cur = ''

print(ans)


Fixed code:
S = input()
ans = []
cur = ''


for i in range(len(S)):
    cur += S[i]

    if len(ans) == 0:
        ans.append(cur)
        cur = ''
    else:
        if ans[len(ans)-1] != cur:
            ans.append(cur)
            cur = ''

print(len(ans))
Buggy code:
S = input()
n = len(S)
A = [S[0]]
B = [S[0:2]]
i = 0
j = 0
while i< n-1:
  if A[j] != S[i+1]:
    A.append(S[i+1])
    i += 1
    j+=1
  else:
    A.append(S[i+1:i+3])
    i += 2
    j += 1
i = 1
j = 0
while i< n-1:
  if B[j] != S[i+1]:
    B.append(S[i+1])
    i += 1
    j+=1
  else:
    B.append(S[i+1:i+3])
    i += 2
    j += 1
if A[-1] ==A[-2]:
  del A[-1]
if B[-1] == B[-2]:
  del B[-1]
print(A, B)
print(max(len(A), len(B)))

Fixed code:
S = input()
n = len(S)
A = [S[0]]
B = [S[0:2]]
i = 0
j = 0
while i< n-1:
  if A[j] != S[i+1]:
    A.append(S[i+1])
    i += 1
    j+=1
  else:
    A.append(S[i+1:i+3])
    i += 2
    j += 1
i = 1
j = 0
while i< n-1:
  if B[j] != S[i+1]:
    B.append(S[i+1])
    i += 1
    j+=1
  else:
    B.append(S[i+1:i+3])
    i += 2
    j += 1
if A[-1] ==A[-2]:
  del A[-1]
if B[-1] == B[-2]:
  del B[-1]

print(max(len(A), len(B)))
Buggy code:
S = input()
count = 0
start = 0
end = 1
hold_value = ""
while end <= len(S):
    if hold_value == S[start:end]:
        end += 1
    else:
        hold_value = S[start:end]
        print(hold_value)
        start = end
        end += 1
        count += 1
print(count)

Fixed code:
S = input()
count = 0
start = 0
end = 1
hold_value = ""
while end <= len(S):
    if hold_value == S[start:end]:
        end += 1
    else:
        hold_value = S[start:end]
        #print(hold_value)
        start = end
        end += 1
        count += 1
print(count)
Buggy code:
import sys
def I(): return(int(sys.stdin.readline()))
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def S(): return(input())

def main():
  S = S()
  cur = [[1,S[0],""],[0,"",S[0]]]
  nxt = []
  N = len(S)
  
  for i in range(1,N):
    for c,p,n in cur:
      if len(n)==2 and p!=n+S[i]:
        nxt.append([c+1,n+S[i],""])
      elif len(n)=<1:
        nxt.append([c,p,n+S[i]])
        if p!=n+S[i]:
          nxt.append([c+1,n+S[i],""])
    nxt.sort(key = lambda x: x[0], reverse = True)
    nxt.sort(key = lambda x:(x[1],x[2]))
    cur = [nxt[0]]
    for j in range(1,len(nxt)):
      if cur[-1][1:] != nxt[j][1:]:
        cur.append(nxt[j])
    nxt = []
  r = -1
  for c,p,n in cur:
    if n == "":
      r = max(r,c)
  return r

if __name__ == "__main__":
  print(main())

      

Fixed code:
import sys
def I(): return(int(sys.stdin.readline()))
def LI(): return([int(x) for x in sys.stdin.readline().split()])
def s(): return(input())

def main():
  S = s()
  cur = [[1,S[0],""],[0,"",S[0]]]
  nxt = []
  N = len(S)
  
  for i in range(1,N):
    for c,p,n in cur:
      if len(n)==1 and p!=n+S[i]:
        nxt.append([c+1,n+S[i],""])
      elif len(n)==0:
        nxt.append([c,p,n+S[i]])
        if p!=n+S[i]:
          nxt.append([c+1,n+S[i],""])
    nxt.sort(key = lambda x: x[0], reverse = True)
    nxt.sort(key = lambda x:(x[1],x[2]))
    cur = [nxt[0]]
    for j in range(1,len(nxt)):
      if cur[-1][1:] != nxt[j][1:]:
        cur.append(nxt[j])
    nxt = []
  r = -1
  for c,p,n in cur:
    if n == "":
      r = max(r,c)
  return r

if __name__ == "__main__":
  print(main())
Buggy code:
from collections import deque
s = deque(x for x in input())
s.append(0)
k = 0
l = [s[0]]
while True:
  if s[0] == 0:
    break
  elif l[k] == s[0]:
    l.append(s.popleft()+s.popleft())
  else:
    l.append(s.popleft())
  k += 1
print(len(l))

Fixed code:
from collections import deque
s = deque(x for x in input())
s.append('END')
k = 0
l = [s.popleft()]
while True:
  if s[0] == 'END':
    break
  elif l[k] == s[0]:
    if s[1] == 'END':
      break
    else:
      l.append(s.popleft()+s.popleft())
  else:
    l.append(s.popleft())
  k += 1
print(len(l))