qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import itertools
n = input()
s = input()

ans = [[k, len(list(g))] for k, g in itertools.groupby(s)]
len(ans)

Fixed code:
import itertools
n = input()
s = input()

ans = [[k, len(list(g))] for k, g in itertools.groupby(s)]
print(len(ans))
Buggy code:
N = int(input())
S = input()

S = S + 'A'
last = S[0]
cnt = 0
for s in S[1:]:
    if last == s:
        continue
    else:
        cnt += 1
        last = s
print(cnt-1)

Fixed code:
N = int(input())
S = input()

S = S + 'A'
last = S[0]
cnt = 0
for s in S[1:]:
    if last == s:
        continue
    else:
        cnt += 1
        last = s
print(cnt)
Buggy code:
# coding: utf-8
# Your code here!

n = int(input())
s = list(input())

print(s)

i = 0
while(i < len(s)-1):
    if(s[i] == s[i+1]):
        s.pop(i+1)
    else:
        i+=1
print(len(s))


Fixed code:
# coding: utf-8
# Your code here!

n = int(input())
s = list(input())


i = 0
while(i < len(s)-1):
    if(s[i] == s[i+1]):
        s.pop(i+1)
    else:
        i+=1
print(len(s))
Buggy code:
from itertools import groupby
s = input()
print(len(list(groupby(s))))

Fixed code:
from itertools import groupby
input()
s=input()
print(len(list(groupby(s))))
Buggy code:
import sys
from itertools import accumulate
input = sys.stdin.readline
def inputs():return [int(x) for x in input().split()]
N = int(input())
S= list(input())
s = []
cnt= 1
for i in range(len(S)-1):
  if S[i]==S[i+1]:
    cnt+=1
  else:
    s.append(cnt)
    cnt=1
s.append(cnt)
print(len(s))



Fixed code:
import sys
from itertools import accumulate
input = sys.stdin.readline
def inputs():return [int(x) for x in input().split()]
N = int(input())
S= list(input())
s = []
cnt= 1
for i in range(len(S)-2):
  if S[i]==S[i+1]:
    cnt+=1
  else:
    s.append(cnt)
    cnt=1
s.append(cnt)
print(len(s))
Buggy code:
n=int(input())
s=input()
s=list(s)
print(s)
T=[]
tmp=0
for i in range(len(s)):
    if s[i]!=tmp:
        T.append(s[i])
        tmp=s[i]
print(len(T))

Fixed code:
n=int(input())
s=input()
s=list(s)
T=[]
tmp=0
for i in range(len(s)):
    if s[i]!=tmp:
        T.append(s[i])
        tmp=s[i]
print(len(T))
Buggy code:
from heapq import heappush, heappop
from collections import deque,defaultdict,Counter
import itertools
from itertools import permutations,combinations,groupby
import sys
import bisect
import string
#import math
#import time
#import random  # randome is not available at Codeforces
def I():
    return int(input())
def MI():
    return map(int,input().split())
def LI():
    return [int(i) for i in input().split()]
def LI_():
    return [int(i)-1 for i in input().split()]
def StoI():
    return [ord(i)-97 for i in input()]
def show(*inp,end='\n'):
    if show_flg:
        print(*inp,end=end)
YN=['Yes','No']
mo=10**9+7
inf=float('inf')
#eps=10**(-10)
#ts=time.time()
#sys.setrecursionlimit(10**6)
input=lambda: sys.stdin.readline().rstrip()

show_flg=False
show_flg=True

n=I()
s=StoI()
ans=0
groupby(s)
print(len(s))


Fixed code:
from heapq import heappush, heappop
from collections import deque,defaultdict,Counter
import itertools
from itertools import permutations,combinations,groupby
import sys
import bisect
import string
#import math
#import time
#import random  # randome is not available at Codeforces
def I():
    return int(input())
def MI():
    return map(int,input().split())
def LI():
    return [int(i) for i in input().split()]
def LI_():
    return [int(i)-1 for i in input().split()]
def StoI():
    return [ord(i)-97 for i in input()]
def show(*inp,end='\n'):
    if show_flg:
        print(*inp,end=end)
YN=['Yes','No']
mo=10**9+7
inf=float('inf')
#eps=10**(-10)
#ts=time.time()
#sys.setrecursionlimit(10**6)
input=lambda: sys.stdin.readline().rstrip()

show_flg=False
show_flg=True

n=I()
s=StoI()
ans=0

for i in groupby(s):
    ans+=1
print(ans)
Buggy code:
import sys
input = sys.stdin.readline
from itertools import groupby
def print_ans(input_line):
    """Test Case
    >>> print_ans("aabbbbaaca")
    5
    >>> print_ans("aaaaa")
    1
    >>> print_ans("xxzaffeeeeddfkkkkllq")
    10
    """
    print(len(list(groupby(input_line))))

if __name__ == '__main__':
    N = int(input())
    print_ans(input())

Fixed code:
import sys
input = sys.stdin.readline
from itertools import groupby
def print_ans(input_line):
    """Test Case
    >>> print_ans("aabbbbaaca")
    5
    >>> print_ans("aaaaa")
    1
    >>> print_ans("xxzaffeeeeddfkkkkllq")
    10
    """
    print(len(list(groupby(input_line))))

if __name__ == '__main__':
    N = int(input().rstrip())
    s = input().rstrip()
    print_ans(s)
Buggy code:
N = int(input())
S = list(input())
li = list()
for i in range(N-1):
    if S[i] != S[i+1]:
        li.append(S[i])
print(len(li))

Fixed code:
N = int(input())
S = list(input())
li = list()
for i in range(N):
    if i < N-1:
        if S[i] != S[i+1]:
            li.append(S[i])
    else:
        li.append(S[i])
print(len(li))
Buggy code:
from sys import stdin
input = stdin.readline
lmi = lambda: list(map(int, input().split()))
mi = lambda: map(int, input().split())

n = int(input())
s = input().strip('\n')
ans = 0
for i in range(1, n):
    if s[i] != s[i-1]:
        ans += 1
print(ans)

Fixed code:
from sys import stdin
input = stdin.readline
lmi = lambda: list(map(int, input().split()))
mi = lambda: map(int, input().split())

n = int(input())
s = input().strip('\n')
ans = 0
for i in range(1, n):
    if s[i] != s[i-1]:
        ans += 1
print(ans+1)
Buggy code:
N = int(input())
colors = list(input())
before = ""
ans = 0
for color in colors:
  if color != before:
    ans += 1
  else:
    before = color
print(ans)

Fixed code:
N = int(input())
colors = list(input())
before = ""
ans = 0
for color in colors:
  if color != before:
    ans += 1
    before = color
print(ans)
Buggy code:
import sys
N = int(sys.stdin.readline())
S = input()

lis = list(S)

count = 0
c = 0

for i in lis:
    c += 1
    if len(lis) == c :
        print(count)
    elif lis[c - 1] == lis[c]:
        count += 1


Fixed code:
import sys
N = int(sys.stdin.readline())
S = input()

lis = list(str(S))

count = N
c = 0

for i in lis:
    c += 1
    if len(lis) == c:
            print(count)
    elif lis[c - 1] == lis[c]:
        count -= 1
Buggy code:
N=int(input())
S=input()
last = s[0]
cnt = 0
for s in S[1:]:
  if last != s:
    cnt+=1
    last = s
print(cnt)

Fixed code:
N=int(input())
S=input()
last = S[0]
cnt = 1
for s in S[1:]:
  if last != s:
    cnt+=1
    last = s
print(cnt)
Buggy code:
n = int(input())
s =  [str(m) for m in list(str(input()))]
nd = list()
for i in range(n-1):
        if s[i] != s[i+1]:
            nd.append(s[i])
if s[n-2] != s[n-1]:
    nd.append(s[n-1])
print(nd)

Fixed code:
n = int(input())
s =  [str(m) for m in list(str(input()))]
nd = list()
for i in range(n-1):
        if s[i] != s[i+1]:
            nd.append(s[i])

print(len(nd)+1)
Buggy code:
n = int(input())
s = str(input())
s += "A"
q = s[0]
ans = 0
for i in range(n+1):
  if(q==s[i]):
    None:
  else:
    ans += 1
    q = s[i]
print(ans)

Fixed code:
n = int(input())
s = str(input())
s += "A"
q = s[0]
ans = 0
for i in range(n+1):
  if(q==s[i]):
    None
  else:
    ans += 1
    q = s[i]
print(ans)
Buggy code:
n = int(input())
s = input
count = 0
for i in range(n-1):
  if s[i]  != s[i+1];
    count = count + 1
print(count)

Fixed code:
n = int(input())
s = input()
count = 1
for i in range(n-1):
  if s[i+1]  != s[i]:
    count = count + 1
print(count)
Buggy code:
_,S=open(0);print(sum(1for a,b in zip("0"+S,S)if a!=b))

Fixed code:
_,S=input(),input();print(sum(1for a,b in zip("0"+S,S)if a!=b))
Buggy code:
N = int(input())
S = list(input())
new_S = ''

for s1,s2 in zip([0]+S,S):
  if s1 != s2:
    new_S += s2

print(new_S)

Fixed code:
N = int(input())
S = list(input())
new_S = ''

for s1,s2 in zip([0]+S,S):
  if s1 != s2:
    new_S += s2

print(len(new_S))
Buggy code:
n = int(input())
s_word = list(input())
start_w = s_word[0]
goal_num = 0
for i in range(n-1):
    if s_word[i+1] != start_w:
        start_w = s_word[i+1]
        res += 1
res +=1
print(res)

Fixed code:
n = int(input())
s_word = list(input())
start_w = s_word[0]
goal_num = 0
for i in range(n-1):
    if s_word[i+1] != start_w:
        start_w = s_word[i+1]
        goal_num += 1
goal_num +=1
print(goal_num)
Buggy code:
N=int(input())
S=input()
ans = 0
for i in range(N-1):
  if S[i] != S[i+1]:
    ans += 1
print(ans)

Fixed code:
N = int(input())
S = input()

ans = 1
for i in range(N-1):
    if(S[i] != S[i+1]):
        ans += 1

print(ans)
Buggy code:
N = int(input())
S = input()
ans=0
for i in range(1,N):
    if S[i]!=S[i-1]
        ans+=1
print(ans+1)

Fixed code:
N = int(input())
S = input()
ans=0
for i in range(1,N):
    if S[i]!=S[i-1]:
        ans+=1
print(ans+1)
Buggy code:
import sys
readline = sys.stdin.buffer.readline

n = int(input())
s = input()

ans = ""

for i in range(n):
    if i == 0:
        ans = s[i]
    elif s[i] != s[i - 1]:
        ans += s[i]
    else:
        pass

print(ans)


Fixed code:
import sys
readline = sys.stdin.buffer.readline

n = int(input())
s = input()

ans = ""

for i in range(n):
    if i == 0:
        ans = s[i]
    elif s[i] != s[i - 1]:
        ans += s[i]
    else:
        pass

print(len(ans))
Buggy code:
n=int(input)
s=input()
cnt=0
for i in range(n-1):
  if s[i] != s[i+1]:
    cnt+=1
print(cnt+1)

Fixed code:
n=int(input())
s=input()
d=list(s)
cnt=0
for i in range(n-1):
  if s[i] != s[i+1]:
    cnt+=1
print(1+cnt)
Buggy code:
N = int(input())
S=list(input())
cnt=0
for i in range(N-1):
  if S[i]!=S[i+1]:
    cnt+=1
    
print(len(S)-(cnt+1))

Fixed code:
N = int(input())
S=list(input())
cnt=0
for i in range(N-1):
  if S[i]==S[i+1]:
    cnt+=1
    
print(len(S)-cnt)
Buggy code:
N = int(input())
S = input()

ans = 0
tmp = S[0]
for s in S:
    if s != tmp:
        ans += 1

if ans == 0:
    print(1)
else:
    print(ans)


Fixed code:
N = int(input())
S = input()

ans = 1
tmp = S[0]
for s in S:
    if s != tmp:
        ans += 1
        tmp = s

print(ans)
Buggy code:
N=int(input())
S=list(input())
if S[0] == S[1]:
  S[0]==" "
for i in range(2,N):
  if S[i-1]==S[i]:
    S[i-1]=" "
A=[]
for i in range(N):
      if S[i]!=" ":
            A.append(S[i])
print(len(A))


Fixed code:
N=int(input())
S=list(input())
if N == 1:
  print(1)
if N>=2:
  if S[0] == S[1]:
    S[0]==" "
  for i in range(1,N):
    if S[i-1]==S[i]:
      S[i-1]=" "
  A=[]
  for i in range(N):
        if S[i]!=" ":
              A.append(S[i])
  print(len(A))
Buggy code:
N = int(input())
S = list(input())
 
length = 1
i = 0
while i < N-1:
  if S[i] == S[i+1]:
    i += 1
  else:
    lendth += 1
    i += 1
    
print(length)

Fixed code:
N = int(input())
S = list(input())
 
length = 1
i = 0
while i < N-1:
  if S[i] == S[i+1]:
    i += 1
  else:
    length += 1
    i += 1
    
print(length)
Buggy code:
N = int(input())
S = input()


current = ""
ans = ""
for s in S:
    if s != current:
        current = s
        ans += s

# print(len(ans))
print(ans)





Fixed code:
N = int(input())
S = input()


current = ""
ans = ""
for s in S:
    if s != current:
        current = s
        ans += s

print(len(ans))
# print(ans)
Buggy code:
n=int(input())
s=input()
x=0
for i in range(0,n-1):
  if s[i]=s[i+1]:
    x+=1
print(n-x)

Fixed code:
n=int(input())
s=input()
x=0
for i in range(0,n-1):
  if s[i]==s[i+1]:
    x+=1
print(n-x)
Buggy code:
def main():
    baselist=[]
    anslist=[]
    baseword = input()
    [baselist.append(i) for i in baseword]
    for index,value in enumerate(baselist):
        if int(index+1)<int(len(baselist)):
            if baselist[index]!=baselist[index+1]:
                anslist.append(baselist[index])
        else:
            anslist.append(baselist[index])
    print(len(anslist))

if __name__ == "__main__":
    main()

Fixed code:
def main():
    baselist=[]
    anslist=[]
    N = input()
    baseword = input().rstrip()
    [baselist.append(i) for i in baseword]
    for index,value in enumerate(baselist):
        if int(index+1)<int(len(baselist)):
            if baselist[index]!=baselist[index+1]:
                anslist.append(baselist[index])
        else:
            anslist.append(baselist[index])
    print(len(anslist))

if __name__ == "__main__":
    main()
Buggy code:
# ABC143 C
N = int(input())
S = input()
L = [s for s in S]
print(L)
M = []
cnt = 0
ans_c = 0

if N == 1:
    print(1)
    exit()

for i in range(N-1):
    if L[i]==L[i+1]:
        cnt += 1
    else:
        ans_c += cnt
        cnt = 0
    if i == N-2:
        ans_c += cnt
print(N-ans_c)

Fixed code:
# ABC143 C
N = int(input())
S = input()
L = [s for s in S]

M = []
cnt = 0
ans_c = 0

if N == 1:
    print(1)
    exit()

for i in range(N-1):
    if L[i]==L[i+1]:
        cnt += 1
    else:
        ans_c += cnt
        cnt = 0
    if i == N-2:
        ans_c += cnt
print(N-ans_c)
Buggy code:
N = int(input())
s = input()
cnt = 0
for i in range(1,N):
  if s[i] != s[i-1]:
    cnt += 1
print(cnt)


Fixed code:
N = int(input())
s = input()
cnt = 1
for i in range(1,N):
  if s[i] != s[i-1]:
    cnt += 1
print(cnt)
Buggy code:
n=int(input())
s=input()
c=0
for i in range(n-1):
    if s[i]==s[i+1]:
        c+=1
print(c)


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

c = 1
for i in range(n-1):
  c += 1 if s[i] != s[i+1] else 0

print(c)
Buggy code:
n=int(input())
s=input()
ans=1

for i in range(n-1):
  flag=s[0]
  if s[i+1]!=flag:
    ans+=flag
    flag=s[i+1]
print(flag)
    

Fixed code:
n=int(input())
s=input()
ans=1
flag=s[0]

for i in range(n-1):
  if s[i+1]!=flag:
    ans+=1
    flag=s[i+1]
print(ans)
Buggy code:
N = int(input())
S = list(input())
gr = itertools.groupby(S)
ans = len([1 for key, group in gr])
print(ans)

Fixed code:
import itertools
N = int(input())
S = list(input())
gr = itertools.groupby(S)
ans = len([1 for key, group in gr])
print(ans)
Buggy code:
n=int(input())
s=list(input())
a=[]
a.append(s[0])
for i in range(n-1):
  if s[i] != s[i+1]:
    a.append(s[l+1])
  else:
    continue
print(len(a))

Fixed code:
n=int(input())
s=list(input())
a=[]
a.append(s[0])
for i in range(n-1):
  if s[i] != s[i+1]:
    a.append(s[i+1])
  else:
    continue
print(len(a))
Buggy code:
import sys
input = sys.stdin.readline

N = int(input())
s= list(input())

s0 = s.pop()

cnt = 1

while s:
    s1 = s.pop()
    if s1!=s0:
        cnt += 1
        s0 = s1
print(cnt)


Fixed code:
#import sys
#input = sys.stdin.readline
 
N = int(input())
s= list(input())
 
s0 = s.pop()
 
cnt = 1
 
while s:
    s1 = s.pop()
    if s1!=s0:
        cnt += 1
        s0 = s1
print(cnt)
Buggy code:
n = int(input())
s = input()

color_length = []
c = 1

for i in range(n-1):
    
    if s[i] == s[i+1]:
        c += 1
    
    else:
        color_length.append(c)
        c = 1

color_length.append(c)

print(color_length)


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

color_length = []
c = 1

for i in range(n-1):
    
    if s[i] == s[i+1]:
        c += 1
    
    else:
        color_length.append(c)
        c = 1

color_length.append(c)

print(len(color_length))
Buggy code:
N=int(input())
S=list(input())
print(S)
for i in range(N-1):
    if S[i]==S[i+1]:
        S[i]='0'
S = [i for i in S if i != '0']
print(len(S))


Fixed code:
N=int(input())
S=list(input())
for i in range(N-1):
    if S[i]==S[i+1]:
        S[i]='0'
S = [i for i in S if i != '0']
print(len(S))
Buggy code:
import sys
N = int(input())
S = input()
if N == 1:
    print("1")
    sys.exit()
ans = 0
for i in range(N - 1):
    print(i)
    if S[i] != S[i + 1]:
        ans += 1
        print("if_1")
    if i == N - 2:
        ans += 1
        print("if_2")

print(ans)

Fixed code:
import sys
N = int(input())
S = input()
if N == 1:
    print("1")
    sys.exit()
ans = 0
for i in range(N - 1):
    if S[i] != S[i + 1]:
        ans += 1
    if i == N - 2:
        ans += 1

print(ans)
Buggy code:
n=int(input())
s=input()
c=1
for i in range(1,N):
  if not(S[i]==S[i-1]):c+=1
print(c)

Fixed code:
n=int(input())
s=input()
c=1
for i in range(1,n):
  if not(s[i]==s[i-1]):c+=1
print(c)
Buggy code:
n = int(input())
s = list(input())

i = 0
while i<len(s)-1:
  if s[i] == s[i+1]:
    del s[i]
  else:
    i += 1
print(s)


Fixed code:
n = int(input())
s = list(input())

i = 0
while i<len(s)-1:
  if s[i] == s[i+1]:
    del s[i]
  else:
    i += 1
print(len(s))
Buggy code:
 n = int(input())
 s = input()
cnt = 1
 for i in range(1, n):
     if s[i] != s[i-1]:
         cnt += 1
print(cnt)

Fixed code:
n = int(input())
s = input()
ans = 1
for i in range(1, n):
    if s[i] != s[i - 1]:
        ans += 1
print(ans)
Buggy code:
N=int(input())
S=list(input())
check=[]
for i in range(N-1):
  if S[i]==S[i+1]:
    check.append(i)
reversed(check)
for i in check:
  S.pop(i)


Fixed code:
N=int(input())
S=list(input())
check=[]
for i in range(N-1):
  if S[i]==S[i+1]:
    check.append(i)
check=reversed(check)
for i in check:
  S.pop(i)
print(len(S))
Buggy code:
n = int(input())
a = list(input())
ans = 0

for i in range(n-1):
  if a[i] == a[i+1]:
    ans +=1
print(ans)

Fixed code:
n = int(input())
a = list(input())
ans = 0

for i in range(n-1):
  if a[i] != a[i+1]:
    ans += 1
    

print(ans+1)
Buggy code:
import itertools
N = input()
S = input()

count = 0

gr = itertools.groupby(s)
for key, group in gr:
    # print(list(group))
    count += 1
print(count)

Fixed code:
import itertools
N = input()
S = input()

count = 0

gr = itertools.groupby(S)
for key, group in gr:
    # print(list(group))
    count += 1
print(count)
Buggy code:
n = int(input())
a = input()
b = ''
for i in range(n):
  if b[-1] != i:
    b += i
print(len(b))


Fixed code:
n = int(input())
a = input()
b = '1'
for i in range(n):
  if a[i] != b[-1]:
    b += a[i]
print(len(b)-1)
Buggy code:
N = int(input())
S = list(input())

r = 0
for i in range(N):

    if i + 1 != N:
        if S[i] == S[i+1]:
            pass
        else:
            r = r + 1
    else:
        if S[i] != S[i-1]:
            r = r + 1
        else:
            pass

print(r)

Fixed code:
N = int(input())
S = list(input())

r = 1
for i in range(N):

    if i + 1 != N:
        if S[i] == S[i+1]:
            pass
        else:
            r = r + 1
    else:
        pass

print(r)
Buggy code:
n = int(input())
s = list(str(input()))
a = ''
ans = 0
for i in s:
  if s[i] != a:
    a = s[i]
    ans += 1
print(ans)

Fixed code:
n = int(input())
s = list(str(input()))
a = ''
ans = 0
for i in range(n):
  if s[i] != a:
    a = s[i]
    ans += 1
print(ans)
Buggy code:
N = int(input())
S = input()
List_S = list(S)
Ans = 1

print(List_S)

for i in range(N-1):
    if List_S[i] != List_S[i+1]:
        Ans += 1
    
print(Ans)

Fixed code:
N = int(input())
S = input()

List_S = list(S)
Ans = 1

for i in range(N-1):
    if List_S[i] != List_S[i+1]:
        Ans += 1
    
print(Ans)
Buggy code:
n = int(input())
s = input()
res = ""
x = ""
for l in s:
  if i != x:
    x = l
    res += x
  else: pass
print(len(res))

Fixed code:
n = int(input())
s = input()
res = ""
x = ""
for l in s:
  if l != x:
    x = l
    res += x
  else: pass
print(len(res))
Buggy code:
N = int(input())
S = input()

ans = 0
x = 'X'
for s in S:
  if x == s:
    ans += 1
  x = s
  
print(ans)

Fixed code:
N = int(input())
S = input()

ans = 0
x = 'X'
for s in S:
  if x != s:
    ans += 1
  x = s
  
print(ans)
Buggy code:
import copy

n = int(input())
str = input()
char_list = list(str)
#del_num = []

#dellist = lambda items, indexes: [item for index, item in enumerate(items) if index not in indexes]
ans =0
for i in range(len(char_list)-1):
    if char_list[i] == char_list[i+1]:
#        del_num.append(i+1)
        ans += 1

print(ans)


Fixed code:
n = int(input())
str = input()
char_list = list(str)
#del_num = []

count =0
ans =0

#dellist = lambda items, indexes: [item for index, item in enumerate(items) if index not in indexes]
for i in range(len(char_list)-1):
    if char_list[i] == char_list[i+1]:
        #del_num.append(i+1)
        count += 1

ans = n - count

print(ans)
Buggy code:
N=int(input())
S=input()
d=[]
for i in range(N):
    if i==1:
        d.append(S[i])
    elif S[i]!=S[i-1]:
        d.append(S[i])
print(len(d))

Fixed code:
N=int(input())
S=input()
d=[]
for i in range(N):
    if i==0:
        d.append(S[i])
    elif S[i]!=S[i-1]:
        d.append(S[i])
print(len(d))
Buggy code:
N = int(input())
S = input()
X = ""
for i in range(N):
  if(len(X) == 0):
    X = X + S[i]
  else:
    if(X[-1] != S[i]):
      X = X + S[i]
print(X)

Fixed code:
N = int(input())
S = input()
X = ""
for i in range(N):
  if(len(X) == 0):
    X = X + S[i]
  else:
    if(X[-1] != S[i]):
      X = X + S[i]
print(len(X))
Buggy code:
n = int(input())
s = input()
count = 0
for i in range(1,n):
    if s[i] == s[i-1]:
        count += 1
print(count)

Fixed code:
n = int(input())
s = input()
count = 1
for i in range(1,n):
    if s[i] != s[i-1]:
        count += 1
print(count)
Buggy code:
N = int(input())
S = input()

prev = None
for i in S:
  if prev != i:
  	prev = i
    count += 1
print(count)

Fixed code:
N = int(input())
S = input()

prev = None
count = 0

for i in S:
  if prev != i:
    prev = i
    count += 1
    
print(count)
Buggy code:
n = int(input())
s = input()

ans = 1
current = s[0]
for i in range(n):
  if current != s[i]:
    ans += 1 
    current = s[i]
print ans
  
  

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

ans = 1
current = s[0]
for i in range(n):
  if current != s[i]:
    ans += 1 
    current = s[i]
print(str(ans))
Buggy code:
n = int(input())
s = list(str(input()))

new_s = ""
temp=""

for i in range(n):
  if temp != s[i]:
    new_s += s[i]
    temp=s[i]

print(new_s)

Fixed code:
n = int(input())
s = list(str(input()))

new_s = ""
temp=""

for i in range(n):
  if temp != s[i]:
    new_s += s[i]
    temp=s[i]

print(len(list(new_s)))
Buggy code:
a = int(input())
s = input()
i = 0
while(i<len(s)-1):
  if s[i] == s[i+1]:
    s.pop(i)
  else:
    i+=1
print(len(s))

Fixed code:
a = int(input())
s = list(input())
i = 0
while(i<len(s)-1):
  if s[i] == s[i+1]:
    s.pop(i)
  else:
    i+=1
print(len(s))
Buggy code:
le = int(input())
lis = list(input())
alis = []
def delete(n,lis):
    for i in range(n):
        if i==n-1 or lis[i] != lis[i-1]  :
            alis.append(lis[i])
delete(le,lis)
print(len(alis))


Fixed code:
le = int(input())
lis = list(input())
alis = []
def delete(n,lis):
    for i in range(n):
        if i==n-1 or lis[i] != lis[i+1]  :
            alis.append(lis[i])
delete(le,lis)
print(len(alis))
Buggy code:
import sys

def main():

	args = sys.argv
	N = int(input())
	S = input()
	C = 0
	
	for i in range(0, N-1):
		if S[i] == S[i+1]:
			C = C+1;
			
	print(C)

if __name__ == "__main__":
    main()

Fixed code:
import sys

def main():

	args = sys.argv
	N = int(input())
	S = input()
	C = 1
	
	for i in range(0, N-1):
		if S[i] != S[i+1]:
			C = C+1
	print(C)

if __name__ == "__main__":
    main()
Buggy code:
n = int(input())
s = input()
a = 1
for i in range(n-1):
  if s[i] != s[i+1]:
    a += 1

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

a = 1
for i in range(n-1):
    if s[i]!=s[i+1]:
        a += 1
print(a)
Buggy code:
n = int(input())
S = list(input())
ans =0
now_number =0

for i in range(n-1):
    if(S[i] != S[i+1]):
        ans +=1
print(ans)

Fixed code:
n = int(input())
S = list(input())
ans =1
now_number =0

for i in range(n-1):
    if(S[i] != S[i+1]):
        ans +=1
print(ans)
Buggy code:
N = int(input())
S = input()

S=S +"1"
state=0
bonus_sum=0
gokei=0
bonus=0

for i in range(N):
    print("gokei",gokei)
    print("bonus", bonus)
    print("bonus_sum", bonus_sum)
    print(S[i],S[i+1])
    
    if S[i] != S[i +1 ]:
        gokei=gokei+1
        bonus_sum=bonus_sum +bonus
        bonus=0
    else:
        gokei=gokei +1
        bonus = bonus +1

        
print(gokei - bonus_sum)

Fixed code:
N = int(input())
S = input()

S=S +"1"
state=0
bonus_sum=0
gokei=0
bonus=0

for i in range(N):
    #print("gokei",gokei)
    #print("bonus", bonus)
    #print("bonus_sum", bonus_sum)
    #print(S[i],S[i+1])
    
    if S[i] != S[i +1 ]:
        gokei=gokei+1
        bonus_sum=bonus_sum +bonus
        bonus=0
    else:
        gokei=gokei +1
        bonus = bonus +1

        
print(gokei - bonus_sum)