qyliang/CodeNanoFix huggingface dataset:
Buggy code:
n = int(input())
keta = len(str(n))
if n == 1:
  print(n)
elif n == 2:
  print(n)
elif n == 3:
  ans = 9 + n - 99
  print(ans)
elif n == 4:
  ans = 999 - 99 + 9
  print(ans)
elif n == 5:
  ans = n - 9999 + 999 - 99 + 9
elif n == 6:
  print(90909)


Fixed code:
m = int(input())
n = len(str(m))
if n == 1:
  print(m)
elif n == 2:
  print(9)
elif n == 3:
  ans = 9 + m - 99
  print(ans)
elif n == 4:
  ans = 999 - 99 + 9
  print(ans)
elif n == 5:
  ans = m - 9999 + 999 - 99 + 9
  print(ans)
elif n == 6:
  print(90909)
Buggy code:
N= int(input())
ans=0
for i in range(1,N):
    l=len(str(i))
    if not l%2==0:
        ans+=1
print(ans)

Fixed code:
N= int(input())
ans=0
for i in range(1,N+1):
    l=len(str(i))
    if not l%2==0:
        ans+=1
print(ans)
Buggy code:
import math

N = int(input())

count = 1
for i in range(1, N+1):
  if math.floor(math.log10(i)) % 2 == 0:
    count += 1
print(count)

Fixed code:
import math
 
N = int(input())
 
count = 0
for i in range(1, N+1):
  if math.floor(math.log10(i)) % 2 == 0:
    count += 1
print(count)
Buggy code:
a = int(input())
count = 0
for i in range(a):
  if len(str(i)) % 2 == 1:
    count += 1
print(count - 1)

Fixed code:
a = int(input())
count = 0
for i in range(a + 1):
  if len(str(i)) % 2 == 1:
    count += 1
print(count - 1)
Buggy code:
n = int(input())

ans = 0
for i in range(1, n):
    if len(str(i)) % 2 == 1:
        ans += 1
print(ans)


Fixed code:
n = int(input())

ans = 0
for i in range(1, n + 1):
    if len(str(i)) % 2 == 1:
        ans += 1
print(ans)
Buggy code:
n = int(input())
cnt = 0
for i in range(1,n+1):
  if len(str(i)%2 == 0):
    cnt += 1
print(cnt)

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

count = 0
for i in range(1, n+1):
    if len(str(i)) % 2 == 1:
        count += 1

print(count)
Buggy code:
import sys

N = int(sys.stdin.read().strip())
total = 0
for v in range(6):
  if v % 2 != 0:
    continue
  low = 10 ** v
  high = 10 ** (v+1)
  if N < low:
    break
  if N >= high:
    total += high - low
  else:
    total += N - low
    break
print(total)


Fixed code:
import sys

N = int(sys.stdin.read().strip())
total = 0
for v in range(6):
  if v % 2 != 0:
    continue
  low = 10 ** v
  high = 10 ** (v+1)
  if N < low:
    break
  if N >= high:
    total += high - low
  else:
    total += N - low + 1
    break
print(total)
Buggy code:
N=int(input())
dig=len(str(N))
digr=dig-(dig%2)-2
intr=sum([10**i for i in range(0, digr+1,2)])*9
if (dig % 2):
    intr=intr+N-10**(dig-1)+1

print(intr+ad)


Fixed code:
N=int(input())
dig=len(str(N))
digr=dig-(dig%2)-2
intr=sum([10**i for i in range(0, digr+1,2)])*9
if (dig % 2):
    intr=intr+N-10**(dig-1)+1

print(intr)
Buggy code:
n = int(input())
count = 0
for i in range(1,n):
  if len(str(i))%2 != 0:
    count += 1
print(count)

Fixed code:
n=int(input())
count=0

for i in range(1,n+1):
  if len(str(i))%2==1:
    count+=1
    
print(count)
Buggy code:
a=int(input())
b=0
for i in range(1,a+1):
  if len(i)%2==1:
    b+=1
print(b)

Fixed code:
a=int(input())
b=0
for i in range(1,a+1):
  if len(str(i))%2==1:
    b+=1
print(b)
Buggy code:
import numpy as np

N = input()

array = np.arange(int(N))

n1=np.count_nonzero(array<10)
n2=np.count_nonzero((100<=array)&(array<1000))
n3=np.count_nonzero((10000<=array)&(array<100000))
ans=n1+n2+n3
print(ans)

Fixed code:
import numpy as np

N = int(input())

array = np.arange(N)+1

n1=np.count_nonzero(array<10)
n2=np.count_nonzero((100<=array)&(array<1000))
n3=np.count_nonzero((10000<=array)&(array<100000))
ans=n1+n2+n3
print(ans)
Buggy code:
n = int(input())

if n <10:
    count += n
elif n <100:
    count += 9
elif n <1000:
    count += n-90
elif n < 1000:
    count += 909
elif n < 10000:
    count += n-9090
elif n < 100000:
    count += 90909
else:
    count += 90910

print(count)

Fixed code:
n = int(input())

if n <10:
    count = n
elif n <100:
    count = 9
elif n <1000:
    count = n-90
elif n < 10000:
    count = 909
elif n < 100000:
    count = n-9090
else:
    count = 90909

print(count)
Buggy code:
N = int(input())

count = 0
for i in range(1,N+1):
  Nstr = str(N)
  if len(Nstr) % 2 == 1:
  	count += 1
print(count)


Fixed code:
N = int(input())

count = 0
for i in range(1,N+1):
  istr = str(i)
  if len(istr) % 2 == 1:
  	count += 1
print(count)
Buggy code:
N = int(input())
l = len(str(N))-1
count = 0
for digit in range(l//2+1):
    count += len(range(10**(digit*2), min(10**(digit*2+1), N+1)))

Fixed code:
N = int(input())
l = len(str(N))-1
count = 0
for digit in range(l//2+1):
    count += len(range(10**(digit*2), min(10**(digit*2+1), N+1)))
print(count)
Buggy code:
n=int(input())
a=range(n)
cnt=0
for x in a:
    if len(str(x))%2==1:
        cnt+=1
print(cnt)

Fixed code:
n=int(input())
a=range(n+1)
cnt=-1
for x in a:
    if len(str(x))%2==1:
        cnt+=1
print(cnt)
Buggy code:
n = int(input())
l = len(str(n))

i = 0
c = 0
while i < l:
  if i == 0:
    if n < 10:
      c = n
      break
    else:
      c = 9
      i = i + 1
  elif i%2 == 1:
    i = i + 1
    continue
  elif i == (l-1):
    print(10**i)
    c = c + (n-((10**i)-1))
    i = i + 1
  else:
    c = c + ((10**l)-(10**(l-1)))
    i = i + 1

print(c)

Fixed code:
n = int(input())
l = len(str(n))
 
i = 0
c = 0
while i < l:
  if i == 0:
    if n < 10:
      c = n
      break
    else:
      c = 9
      i = i + 1
  elif i%2 == 1:
    i = i + 1
    continue
  elif i == (l-1):
    c = c + (n-((10**i)-1))
    i = i + 1
  else:
    c = c + ((10**(i+1))-(10**i))
    i = i + 1
 
print(c)
Buggy code:
n = int(input())
ans = 0
for i in range(1,n+1):
  if len(i) % 2 != 0:
    ans += 1
print(ans)

Fixed code:
n = int(input())
ans = 0
for i in range(1,n+1):
  num = str(i)
  if (len(num) % 2) != 0:
    ans += 1
print(ans)
Buggy code:
count = 0
for i in range(1,n+1):
    if len(str(i)) % 2 == 1:
        count += 1

print(count)

Fixed code:
n = int(input())

count = 0
for i in range(1,n+1):
    if len(str(i)) % 2 == 1:
        count += 1

print(count)
Buggy code:
n = int(input())
cnt=0
for i in range(n):
	if len(str(i))%2==1:
		cnt+=1
print(cnt)

Fixed code:
n = int(input())
cnt=0
for i in range(1,n+1):
	if len(str(i))%2==1:
		cnt+=1
print(cnt)
Buggy code:
if N < 10:
    print(N)
elif 10 <= N < 100:
    print(9)
elif 100 <= N < 1000:
    print(N - 90)
elif 1000 <= N < 10000:
    print(909)
elif 10000 <= N < 100000:
    print(N-9090)
else:
    print(90909)

Fixed code:
N = int(input())

if N < 10:
    print(N)
elif 10 <= N < 100:
    print(9)
elif 100 <= N < 1000:
    print(N-90)
elif 1000 <= N < 10000:
    print(909)
elif 10000 <= N <100000:
    print(N-9090)
else:
    print(90909)
Buggy code:
ans = 0

for i in range(1, N + 1):
    if len(str(i)) % 2 == 1:
        ans += 1
print(ans)

Fixed code:
N = int(input())

ans = 0

for i in range(1, N + 1):
    if len(str(i)) % 2 == 1:
        ans += 1
print(ans)
Buggy code:
a = input()
b = len(list(a))
c = int(a)
d = ''

if b % 2 == 0:
    d = '9' * (b // 2)
    print('0'.join(d))

else:
    if b == 1:
        print(a)
    else:
        d = '9' * (b // 2)
        '0'.join(d)
        d = int(d + '0')
        print(a-d)

Fixed code:
a = input()
b = len(list(a))
c = int(a)
d = ''

if b % 2 == 0:
    d = '9' * (b // 2)
    print('0'.join(d))

else:
    if b == 1:
        print(a)
    else:
        d = '9' * (b // 2)
        d = '0'.join(d)
        d = int(d + '0')
        print(c - d)
Buggy code:
n=int(input())

while(n%10==0):
	n//=10
    
k=str(n)
ans=0

for i in range(1,len(k),2):
	ans+=i*9 
    
if(len(k)%2==1):
	m=n//pow(10,len(n)-1)
	ans+=m-1

print(ans)

Fixed code:
n=int(input())

k=str(n)
ans=0

for i in range(1,len(k),2):
  s="9"
  s*=i
  ans+=int(s)-int(s)//10
    
if(len(k)%2==1):
	m=pow(10,len(k)-1)
	ans+=n-m+1

print(ans)
Buggy code:
N = int(input())
i = 0
r = 0
while i <= N:
    if len(str(i)) % 2 == 1:
        r += 1
    i += 1
print(r)

Fixed code:
N = int(input())
i = 1
r = 0
while i <= N:
    if len(str(i)) % 2 == 1:
        r += 1
    i += 1
print(r)
Buggy code:
n = int(input())
res = 0
for i in range(1,n+1):
  if(len(i)%2):
    res+=1
print(res)

Fixed code:
n = int(input())
res = 0
for i in range(1,n+1):
  if(len(str(i))%2):
    res+=1
print(res)
Buggy code:
N = int(input())
ans = 0
for i in range(1, N+1):
  if len(list(i)) % 2 = 1:
    ans += 1
print(ans)

Fixed code:
N = int(input())
ans = 0

for i in range(1, N+1):
    if len(str(i)) % 2:
        ans += 1

print(ans)
Buggy code:
import os,re
from collections import Counter,deque
from operator import itemgetter
from itertools import accumulate,combinations
from sys import stdin,setrecursionlimit
from copy import deepcopy
import pysnooper
setrecursionlimit(10**6)

n=int(input())
cnt=0
for i in range(1,n+1):
    if len(str(i))%2==1:
        cnt+=1
print(cnt)

Fixed code:
import os,re
from collections import Counter,deque
from operator import itemgetter
from itertools import accumulate,combinations
from sys import stdin,setrecursionlimit
from copy import deepcopy
setrecursionlimit(10**6)

n=int(input())
cnt=0
for i in range(1,n+1):
    if len(str(i))%2==1:
        cnt+=1
print(cnt)
Buggy code:
N = int(input())
cnt = 0

for i in range(N+1):
  i = str(i)
  if len(i)%2==1:
    cnt+=1
    
print(cnt)

Fixed code:
N = int(input())
cnt = 0

for i in range(1,N+1):
  i = str(i)
  if len(i)%2==1:
    cnt+=1
    
print(cnt)
Buggy code:
N = int(input())
ans = 0
for i in range(1, N):
  if len(str(i)) % 2 !=0:
    ans +=1
print(ans)

Fixed code:
N = int(input())
ans = 0
for i in range(1, N+1):
  if len(str(i)) % 2 !=0:
    ans +=1
print(ans)
Buggy code:
n = int(input())
cnt = 0
for i in range(1, n):
    if len(str(i)) % 2 == 1:
        cnt += 1
    else:
        continue
print(cnt)

Fixed code:
n = int(input())
cnt = 0
for i in range(1, n+1):
    if len(str(i)) % 2 == 1:
        cnt += 1
    else:
        continue
print(cnt)
Buggy code:
N = int(input())
if N < 10:
    l = range(N)
else:
    l = range(1, N)

counter = 0
for s in l:
    n = len(str(s))
    if n % 2 == 1:
        counter += 1
print(counter)       

Fixed code:
N = int(input())
if N < 10:
    l = range(N)
else:
    l = range(1, N + 1)

counter = 0
for s in l:
    n = len(str(s))
    if n % 2 == 1:
        counter += 1
print(counter)
Buggy code:
N=int(input())
l=len(str(N))
if l==1:
  print(N)
elif l==2:
  print(9)
elif l==3:
  print(N-90)
elif l==4:
  print(909)
elif l==5:
  print(90909)

Fixed code:
N=int(input())
l=len(str(N))
if l==1:
  print(N)
elif l==2:
  print(9)
elif l==3:
  print(N-90)
elif l==4:
  print(909)
elif l==5:
  print(N-9090)
elif l==6:
  print(90909)
Buggy code:
count=0
n=int(input())
for i in range(1,n+1):
  if len(str(i))%2==0:
    count+=1
print(count)

Fixed code:
a = int(input())
count = 0
for i in range(1,a+1):
  if int((len(str(i))) % 2 == 1):
    count += 1

print(count)
Buggy code:
n = int(input())

ans = 0
for i in range(1,n):
    if(len(str(i))%2==1):
        ans += 1
        
print(ans)

Fixed code:
N = int(input())
ans = 0
for i in range(1, N+1):
    if len(str(i))%2==1:
        ans += 1
print(ans)
Buggy code:
import math


def main():
    n = int(input())
    ans = 0
    for i in range(1, n + 1):
        if math.log(i, 10) // 1 % 2 // 1 == 0:
            ans += 1
    print(ans)


if __name__ == '__main__':
    main()


Fixed code:
import math


def main():
    n = int(input())
    ans = 0
    for i in range(1, n + 1):
        if math.log(i, 10) % 2 // 1 == 0 and i != 1000:
            ans += 1
    print(ans)


if __name__ == '__main__':
    main()
Buggy code:
import math
import copy
from copy import deepcopy
import sys
import fractions
# import numpy as np
from functools import reduce
# import statistics
import decimal
import heapq
import collections
import itertools
from operator import mul

sys.setrecursionlimit(100001)


# input = sys.stdin.readline
# sys.setrecursionlimit(10**6)

# ===FUNCTION===

def getInputInt():
    inputNum = int(input())
    return inputNum


def getInputListInt():
    outputData = []
    inputData = input().split()
    outputData = [int(n) for n in inputData]

    return outputData


def getSomeInputInt(n):
    outputDataList = []
    for i in range(n):
        inputData = int(input())
        outputDataList.append(inputData)

    return outputDataList


def getSomeInputListInt(n):
    inputDataList = []
    outputDataList = []
    for i in range(n):
        inputData = input().split()
        inputDataList = [int(n) for n in inputData]
        outputDataList.append(inputDataList)

    return outputDataList


# ===CODE===

n = int(input())

ans = 0
for i in range(n + 1):
    s = str(i)
    if len(s) % 2 == 1:
        ans += 1

print(ans)


Fixed code:
import math
import copy
from copy import deepcopy
import sys
import fractions
# import numpy as np
from functools import reduce
# import statistics
import decimal
import heapq
import collections
import itertools
from operator import mul

sys.setrecursionlimit(100001)


# input = sys.stdin.readline
# sys.setrecursionlimit(10**6)

# ===FUNCTION===

def getInputInt():
    inputNum = int(input())
    return inputNum


def getInputListInt():
    outputData = []
    inputData = input().split()
    outputData = [int(n) for n in inputData]

    return outputData


def getSomeInputInt(n):
    outputDataList = []
    for i in range(n):
        inputData = int(input())
        outputDataList.append(inputData)

    return outputDataList


def getSomeInputListInt(n):
    inputDataList = []
    outputDataList = []
    for i in range(n):
        inputData = input().split()
        inputDataList = [int(n) for n in inputData]
        outputDataList.append(inputDataList)

    return outputDataList


# ===CODE===

n = int(input())

ans = 0
for i in range(1, n + 1, 1):
    s = str(i)
    if len(s) % 2 == 1:
        ans += 1

print(ans)
Buggy code:
n = int(input())

if n < 10:
  print(n)
elif n < 100:
  print(9)
elif n < 1000:
  print(9+(n-99))
elif n < 10000:
  print(9+900)
elif n <= 100000:
  print(9+900+(n-9999))

Fixed code:
n = int(input())

if n < 10:
  print(n)
elif n < 100:
  print(9)
elif n < 1000:
  print(9+(n-99))
elif n < 10000:
  print(9+900)
elif n < 100000:
  print(9+900+(n-9999))
else:
  print(90909)
Buggy code:
n = int(input())
ans = 0
if n < 10:
  ans += n
else:
  ans += 9
  if n < 1000:
    ans += max(0, n-1000)
  else:
    ans += 900
    if n < 100000:
      ans += max(0, n-100000)
    else:
      ans += 90000
print(ans)


Fixed code:
n = int(input())
ans = 0
if n < 10:
  ans += n
else:
  ans += 9
  if n < 1000:
    ans += max(0, n-99)
  else:
    ans += 900
    if n < 100000:
      ans += max(0, n-9999)
    else:
      ans += 90000
print(ans)
Buggy code:
n=int(input())
ans=0
for i in range(1,n+1):
  if len(str(n))%2==1:
    ans+=1
print(ans)


Fixed code:
N = int(input())

ans = 0

for i in range(1,N+1):
  if len(str(i)) % 2 == 1:
    ans += 1
    
print(ans)
Buggy code:

n = input()
num = int(n)
ans = 0

for i in range(1,num):
    if len(str(i)) % 2 == 1:
        ans += 1
#        print(i)

print(ans)


Fixed code:

n = input()
num = int(n)
ans = 0

for i in range(1,num+1):
    if len(str(i)) % 2 == 1:
        ans += 1
#        print(i)

print(ans)
Buggy code:
n = int(input())

a = 0
for i in range(1, n):
  if len(str(n)) % 2 == 1:
    a += 1
    
print(a)

Fixed code:
n = int(input())

a = 0
for i in range(1, n + 1):
  if len(str(i)) % 2 == 1:
    a += 1
    
print(a)
Buggy code:
N = int(input())						# 5


ans = 0

#1:1-9
if 1<=N<=9:
	ans += N

#2:10-99
if 10<=N<=99:
	ans += 9

#3:100-999
if 100<=N<=999:
	ans += N-99

#4:1000-9999
if 1000<=N<=9999:
	ans += 900

#5:10000-99999
if 10000<=N<=99999:
	ans += N-9999


#6:100000-999999
if 100000<=N<=999999:
	ans += 9999


print(ans)


Fixed code:
N = int(input())						# 5


ans = 0

#1:1-9
if 1<=N<=9:
	ans += N

#2:10-99
if 10<=N:
	ans += 9

#3:100-999
if 100<=N<=999:
	ans += N-99

#4:1000-9999
if 1000<=N:
	ans += 900

#5:10000-99999
if 10000<=N<=99999:
	ans += N-9999


#6:100000-999999
if 100000<=N:
	ans += 90000


print(ans)
Buggy code:
def main:
  s=0
  N=int(input())
  for i in range(1,N+1):
    if (len(str(i)))%2!=0:
      s+=1
  print(s)
  

Fixed code:
s=0
N=int(input())
for i in range(1,N+1):
  if (len(str(i)))%2!=0:
    s+=1
print(s)
Buggy code:
n = int(input())

count = 0
for i in range(n):
  if len(str(i)) % 2 == 1:
    count += 1
print(count)

Fixed code:
n = int(input())

count = 0
for i in range(1, n + 1, 1):
  if len(str(i)) % 2 == 1:
    count += 1
print(count)
Buggy code:
n=int(input())
sum = 0
for i in range(n):
    length = 1
    num = i
    while num >= 10:
        num = num/10
        length += 1
    if (length % 2) == 1:
        sum += 1
print(sum)

Fixed code:
n=int(input())
sum = 0
for i in range(1,n+1):
    length = 1
    num = i
    while num >= 10:
        num = num/10
        length += 1
    if (length % 2) == 1:
        sum += 1
print(sum)
Buggy code:
n = input()
l = int(len(n))
ans = 0
if l == 1:
    print(n)
else:
    for i in range(1,l):
        if i %2 ==1:
            ans += 9*(10**(i-1))
        else:
            ans = ans 
ans += int(n) - 10**(l-1)
print(ans)
    

Fixed code:
n = input()
l = int(len(n))
ans = 0
if l == 1:
    print(n)
elif l % 2 ==1:
    ans += int(n) - 10**(l-1)+1
    for i in range(1,l):
        if i %2 ==1:
            ans += 9*(10**(i-1))
        else:
            ans = ans
    print(ans)
else:
    for i in range(1,l):
        if i %2 ==1:
            ans += 9*(10**(i-1))
        else:
            ans = ans
    print(ans)
Buggy code:
n = input()
l = []
for i in range(1,int(n)+1):
  if len(i)%2 != 0:
    l.append(i)

print(len(l))

Fixed code:
n = input()
l = []
for i in range(1,int(n)+1):
  if len(str(i))%2 != 0:
    l.append(i)

print(len(l))
Buggy code:
N = int(input())
cnt = 0
for i in range(N+1):
	if len(str(i)) % 2 == 1:
		cnt += 1
print(cnt)

Fixed code:
N = int(input())
cnt = 0
for i in range(1,N+1):
    if len(str(i)) % 2 == 1:
        cnt += 1
print(cnt)
Buggy code:
# -*- coding: utf-8 -*-
N= int(input())
if N == 1:
# -*- coding: utf-8 -*-
N = int(input())
digit_count = len(str(N))
if digit_count == 1:
    print(N)
if (digit_count % 2 == 1):
    print(N - int(str(90) * (digit_count//2)))
else:
    total = 0
    for i in range(0, digit_count//2):
        total += 9*(100**i)
    print(total)

Fixed code:
# -*- coding: utf-8 -*-
N = int(input())
digit_count = len(str(N))
if digit_count == 1:
    print(N)
elif (digit_count % 2 == 1):
    print(N - int(str(90) * (digit_count//2)))
else:
    total = 0
    for i in range(0, digit_count//2):
        total += 9*(100**i)
    print(total)
Buggy code:
n = int(input())
ans = 0
for i in range(0,n+1):
    if len(str(i))%2 ==1:
        ans+=1
print(ans)

Fixed code:
n = int(input())
ans = 0
for i in range(1,n+1):
    if len(str(i))%2 == 1:
        ans += 1

print(ans)
Buggy code:
N = int(input())
res = 0
for i in range(N):
    if i <= 9 and i >= 1:
        res += 1
    elif i <= 999 and i >= 100:
        res += 1
    elif i <= 99999 and i >= 10000:
        res += 1
print(res)

Fixed code:
N = int(input())
res = 0
for i in range(N):
    if i+1 <= 9 and i+1 >= 1:
        res += 1
    elif i+1 <= 999 and i+1 >= 100:
        res += 1
    elif i+1 <= 99999 and i+1 >= 10000:
        res += 1
print(res)
Buggy code:
n=input()
N=int(n)
num=0

for i in range(1,len(n)+1):
    if i!=len(n):
        if i%2!=0:
            num+=9*10**(i-1)
    else:
        if i%2!=0:
            num+=int(n[0])*10**(i-1)
print(num)
    


Fixed code:
n=input()
N=int(n)
num=0

for i in range(1,len(n)+1):
    if i!=len(n):
        if i%2!=0:
            num+=9*10**(i-1)
    else:
        if i%2!=0:
            num+=(int(n[0])-1)*10**(i-1)+(N-int(n[0])*10**(i-1))+1
print(num)
Buggy code:
n = int(input())
for i in range(1,n+1):
    if len(str(i)) % 2 == 1:
        ans += 1
print(ans)


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

for i in range(1,n+1):
    a = str(i)
    if len(a)%2 == 1:
        ans += 1

print(ans)
Buggy code:
N = input()
let = len(N)
n = int(N)
ans = 0
for i in range(1,let//2+1):
  ans += 9 * 10**(i-1)
if let % 2 == 1:
  ans += n + 1 - 10**(let-1)
print(ans)

Fixed code:
N = input()
let = len(N)
n = int(N)
ans = 0
for i in range(1,let//2+1):
  ans += 9 * 10**(2*i-2)
if let % 2 == 1:
  ans += n + 1 - 10**(let-1)
print(ans)
Buggy code:
def uneven_numbers(n):

    ans = 0

    for i in range(n):
        if len(str(n)) % 2 != 0:
            ans += 1

    return ans

def main():
    n = int(input())
    print(uneven_numbers(n))

if __name__ == '__main__':
    main()


Fixed code:
def uneven_numbers(n):

    ans = 0

    for i in range(1, n+1):
        if len(str(i)) % 2 != 0:
            ans += 1

    return ans

def main():
    n = int(input())
    print(uneven_numbers(n))

if __name__ == '__main__':
    main()
Buggy code:
n = int(input())
l = len(str(n))
res = 0
if l%2 !=0 :
    res = n+1-10**(l-1)
    while l >= 1:
        l -= 2
        if l > 1:
            res += l*10**(l-1)
        if l == 1:
            res += 9
if l%2 == 0:
    l -= 1
    while l >= 1:
        if l > 1:
            res += l*10**(l-1)
        if l == 1:
            res += 9
        l -= 2
print(res)

Fixed code:
n = int(input())
l = len(str(n))
res = 0
if l%2 != 0 :
    res = n+1-10**(l-1)
    while l >= 1:
        l -= 2
        res += 10**(l-1)*9
if l%2 == 0:
    l -= 1
    while l >= 1:
        res += 10**(l-1)*9
        l -= 2
print(int(res))
Buggy code:
# coding: utf-8
n = input()
cnt = 0
for i in range(1, int(n) + 1):
    if len(str(i)) % 2 == 1:
        print(i)
        cnt += 1

print(cnt)

Fixed code:
# coding: utf-8
n = input()
cnt = 0
for i in range(1, int(n) + 1):
    if len(str(i)) % 2 == 1:
        cnt += 1

print(cnt)
Buggy code:
print(len(list(filter(lambda n: n % 2 == 1, range(1, int(input()) + 1)))))


Fixed code:
print(len((list(filter(lambda n: len(str(n)) % 2 == 1, range(1, int(input()) + 1))))))
Buggy code:
n = int(input())
cnt=0
for i in range(1,n):
    if len(str(i))%2 != 0:
        cnt += 1

print(cnt)

Fixed code:
n = int(input())
cnt = 0
for i in range(1,n+1):
    if len(str(i))%2 ==1:
        cnt+=1
print(cnt)
Buggy code:
N = int(input())

result = list(filter(lambda i: len(str(i)) % 2 != 0, range(1,N)))
print(len(result))

Fixed code:
N = int(input())

result = list(filter(lambda i: len(str(i)) % 2 != 0, range(1,N+1)))
print(len(result))
Buggy code:
a=int(input())
b=0
for i in range(a):
    if len(str(i))%2==1:
        b+=1
print(b)

Fixed code:
a=int(input())
b=0
for i in range(1,a+1):
    if len(str(i))%2==1:
        b+=1
print(b)
Buggy code:
n = input()
s = int(n)
l = len(n)
if l == 1 or l == 2:
    print(s)
if l == 3:
    print(9+s-99)
if l == 4:
    print(909)
if l == 5:
    print(9+900+s-9999)
if l == 6:
    print(90909)

Fixed code:
n = input()
s = int(n)
l = len(n)
if l == 1:
    print(s)
if l == 2:
    print(9)
if l == 3:
    print(9+s-99)
if l == 4:
    print(909)
if l == 5:
    print(9+900+s-9999)
if l == 6:
    print(90909)
Buggy code:
N=int(input())
count=0
for n in range(1,N):
    if 0<n<10:
        count+=1
        continue
    elif 99<n<1000:
        count+=1
        continue
    elif 9999<n<100000:
        count+=1
        continue
    else:
        pass
print(count)


Fixed code:
N=int(input())
count=0
for n in range(1,N+1):
    if 0<n<10:
        count+=1
        continue
    elif 99<n<1000:
        count+=1
        continue
    elif 9999<n<100000:
        count+=1
        continue
    else:
        pass
print(count)
Buggy code:
num = input()

result = 0

if len(num) != 1:
  result = int((len(num)-2)//2 * ("90") + "9")

if len(num) % 2 == 0:
  print(result)
else:
  AAA = int("1" + (len(num) - 1) * "0") - 1
  print(result + int(num) - AAA)
  print(result)
  print(num)
  print(AAA)

Fixed code:
num = input()

result = 0

if len(num) != 1:
  result = int((len(num)-2)//2 * ("90") + "9")

if len(num) % 2 == 0:
  print(result)
else:
  AAA = int("1" + (len(num) - 1) * "0") - 1
  print(result + int(num) - AAA)