qyliang/CodeNanoFix huggingface dataset:
Buggy code:
import functools  # Python3 
N,M = map(int,input().split())
x, y, z = [0] * N, [0] * N, [0] * N
for i in range(N):
	x[i], y[i], z[i] = map(int,input().split())

ppp = sorted([ x[i]+y[i]+z[i] for i in range(N)])[-M:]
pmp = sorted([ x[i]-y[i]+z[i] for i in range(N)])[-M:]
ppm = sorted([ x[i]+y[i]-z[i] for i in range(N)])[-M:]
pmm = sorted([ x[i]-y[i]-z[i] for i in range(N)])[-M:]
mpp = sorted([-x[i]+y[i]+z[i] for i in range(N)])[-M:]
mpm = sorted([-x[i]+y[i]-z[i] for i in range(N)])[-M:]
mmp = sorted([-x[i]-y[i]+z[i] for i in range(N)])[-M:]
mmm = sorted([-x[i]-y[i]-z[i] for i in range(N)])[-M:]

MAX = 0
for lis in [ppp,pmp,ppm,pmm,mpp,mpm,mmp,mmm]:
	cur = functools.reduce(lambda x,y: x+y,filter(lambda t: t >= 0,lis))
	if cur > MAX:
		MAX = cur
print(MAX)


Fixed code:
import functools  # Python3 
N,M = map(int,input().split())
x, y, z = [0] * N, [0] * N, [0] * N
for i in range(N):
	x[i], y[i], z[i] = map(int,input().split())

if M==0:
	print(0)
	exit()

ppp = functools.reduce(lambda x,y: x+y,sorted([ x[i]+y[i]+z[i] for i in range(N)])[-M:])
pmp = functools.reduce(lambda x,y: x+y,sorted([ x[i]-y[i]+z[i] for i in range(N)])[-M:])
ppm = functools.reduce(lambda x,y: x+y,sorted([ x[i]+y[i]-z[i] for i in range(N)])[-M:])
pmm = functools.reduce(lambda x,y: x+y,sorted([ x[i]-y[i]-z[i] for i in range(N)])[-M:])
mpp = functools.reduce(lambda x,y: x+y,sorted([-x[i]+y[i]+z[i] for i in range(N)])[-M:])
mpm = functools.reduce(lambda x,y: x+y,sorted([-x[i]+y[i]-z[i] for i in range(N)])[-M:])
mmp = functools.reduce(lambda x,y: x+y,sorted([-x[i]-y[i]+z[i] for i in range(N)])[-M:])
mmm = functools.reduce(lambda x,y: x+y,sorted([-x[i]-y[i]-z[i] for i in range(N)])[-M:])

MAX = 0
for lis in [ppp,pmp,ppm,pmm,mpp,mpm,mmp,mmm]:
	if lis  > MAX:
		MAX = lis
print(MAX)
Buggy code:
n,m = [int(i) for i in input().split()]
a = [[int(i) for i in input().split()] for j in range(n)]

c = [0,1]
ans = 0
for l,j,k in itertools.product(c,repeat=3):
    ans = max(ans,sum(sorted([a[i][0]*(-1)**l+a[i][1]*(-1)**j+a[i][2]*(-1)**k for i in range(n)])[n-m:]))

print(ans)

Fixed code:
import itertools
n,m = [int(i) for i in input().split()]
a = [[int(i) for i in input().split()] for j in range(n)]

c = [0,1]
ans = 0
for l,j,k in itertools.product(c,repeat=3):
    ans = max(ans,sum(sorted([a[i][0]*(-1)**l+a[i][1]*(-1)**j+a[i][2]*(-1)**k for i in range(n)])[n-m:]))

print(ans)
Buggy code:
N,M=map(int,input().split())
xyz=[list(map(int,input().split())) for i in range(N)]
MAX=0
for index in [[1,1,1],[1,1,-1],[1,-1,1],[1,-1,-1],[-1,1,1],[-1,1,-1],[-1,-1,1],[-1,-1,-1]]:
    LIST=sorted([sum([p[a]*index[a] for a in range(3)]) for p in xyz])[::-1]
    print(LIST)
    if sum(LIST[0:M])>MAX:
        MAX=sum(LIST[0:M])
print(MAX)

Fixed code:
N,M=map(int,input().split())
xyz=[list(map(int,input().split())) for i in range(N)]
MAX=0
for index in [[1,1,1],[1,1,-1],[1,-1,1],[1,-1,-1],[-1,1,1],[-1,1,-1],[-1,-1,1],[-1,-1,-1]]:
    LIST=sorted([sum([p[a]*index[a] for a in range(3)]) for p in xyz])[::-1]
    if sum(LIST[0:M])>MAX:
        MAX=sum(LIST[0:M])
print(MAX)
Buggy code:
n,m = map(int,input().split())
x = []
y = []
z = []
for i in range(n):
    a,b,c = map(int,input().split())
    x.append([a,b,c])
    y.append([-1*a,-1*b,-1*c])


max = 0
for i in range(2):
    for j in range(2):
        for k in range(2):
            list = []
            sum = 0
            for l in range(n):
                if i == 1:
                    tmp1 = x[l][0]
                else:
                    tmp1 = y[l][0]
                if j == 1:
                    tmp2 = x[l][1]
                else:
                    tmp2 = y[l][1]
                if k == 1:
                    tmp3 = x[l][2]
                else:
                    tmp3 = y[l][2]
                list.append(tmp1+tmp2+tmp3)
            list.sort()
            print(list)
            for t in list[n-m:]:
                print(t)
                sum += t
            if sum > max:
                max = sum
print("max = ")
print(max)


Fixed code:
n,m = map(int,input().split())
x = []
y = []
z = []
for i in range(n):
    a,b,c = map(int,input().split())
    x.append([a,b,c])
    y.append([-1*a,-1*b,-1*c])


max = 0
for i in range(2):
    for j in range(2):
        for k in range(2):
            list = []
            sum = 0
            for l in range(n):
                if i == 1:
                    tmp1 = x[l][0]
                else:
                    tmp1 = y[l][0]
                if j == 1:
                    tmp2 = x[l][1]
                else:
                    tmp2 = y[l][1]
                if k == 1:
                    tmp3 = x[l][2]
                else:
                    tmp3 = y[l][2]
                list.append(tmp1+tmp2+tmp3)
            list.sort()
            for t in list[n-m:]:
                sum += t
            if sum > max:
                max = sum
print(max)
Buggy code:
N,M = map(int,input().split())

x = []
y = []
z = []
for k in range(N):
    xx,yy,zz = map(int,input().split())
    x.append(xx)
    y.append(yy)
    z.append(zz)

ite = [-1,1]

s_ori = np.stack([x,y,z])
cc = []
for i in ite:
    for j in ite:
        for k in ite:
            s = s_ori.copy()
            s[0,:] *= i
            s[1,:] *= j
            s[2,:] *= k
            a = np.sum(s,axis = 0)
            b = np.sort(a)[::-1][:M]
            c = sum(b)
            cc.append(c)
print(np.max(cc))

Fixed code:
import numpy as np
N,M = map(int,input().split())

x = []
y = []
z = []
for k in range(N):
    xx,yy,zz = map(int,input().split())
    x.append(xx)
    y.append(yy)
    z.append(zz)

ite = [-1,1]

s_ori = np.vstack([x,y,z])
cc = []
for i in ite:
    for j in ite:
        for k in ite:
            s = s_ori.copy()
            s[0,:] *= i
            s[1,:] *= j
            s[2,:] *= k
            a = np.sum(s,axis = 0)
            b = np.sort(a)[::-1][:M]
            c = sum(b)
            cc.append(c)
print(np.max(cc))
Buggy code:
import heapq
N,M = map(int,input().split())
x = [0 for i in range(N)]
y = [0 for i in range(N)]
z = [0 for i in range(N)]
ap = [0 for i in range(N)]
xn = [0 for i in range(N)]
yn = [0 for i in range(N)]
zn = [0 for i in range(N)]
xp = [0 for i in range(N)]
yp = [0 for i in range(N)]
zp = [0 for i in range(N)]
an = [0 for i in range(N)]
for i in range(N):
	x[i],y[i],z[i] = map(int,input().split())
	ap[i] =  x[i]+y[i]+z[i]
	xn[i] = -x[i]+y[i]+z[i]
	yn[i] =  x[i]-y[i]+z[i]
	zn[i] =  x[i]+y[i]-z[i]
	xp[i] =  x[i]-y[i]-z[i]
	yp[i] = -x[i]+y[i]-z[i]
	zp[i] = -x[i]-y[i]+z[i]
	an[i] = -x[i]-y[i]-z[i]

Ap = sum(heapq.nlargest(M,ap))
Xn = sum(heapq.nlargest(M,ap))
Yn = sum(heapq.nlargest(M,ap))
Zn = sum(heapq.nlargest(M,ap))
Xp = sum(heapq.nlargest(M,ap))
Yp = sum(heapq.nlargest(M,ap))
Zp = sum(heapq.nlargest(M,ap))
An = sum(heapq.nlargest(M,ap))

print(max([Ap,Xn,Yn,Zn,Xp,Yp,Zp,An]))

Fixed code:
import heapq
N,M = map(int,input().split())
x = [0 for i in range(N)]
y = [0 for i in range(N)]
z = [0 for i in range(N)]
ap = [0 for i in range(N)]
xn = [0 for i in range(N)]
yn = [0 for i in range(N)]
zn = [0 for i in range(N)]
xp = [0 for i in range(N)]
yp = [0 for i in range(N)]
zp = [0 for i in range(N)]
an = [0 for i in range(N)]
for i in range(N):
	x[i],y[i],z[i] = map(int,input().split())
	ap[i] =  x[i]+y[i]+z[i]
	xn[i] = -x[i]+y[i]+z[i]
	yn[i] =  x[i]-y[i]+z[i]
	zn[i] =  x[i]+y[i]-z[i]
	xp[i] =  x[i]-y[i]-z[i]
	yp[i] = -x[i]+y[i]-z[i]
	zp[i] = -x[i]-y[i]+z[i]
	an[i] = -x[i]-y[i]-z[i]

Ap = sum(heapq.nlargest(M,ap))
Xn = sum(heapq.nlargest(M,xn))
Yn = sum(heapq.nlargest(M,yn))
Zn = sum(heapq.nlargest(M,zn))
Xp = sum(heapq.nlargest(M,xp))
Yp = sum(heapq.nlargest(M,yp))
Zp = sum(heapq.nlargest(M,zp))
An = sum(heapq.nlargest(M,an))

print(max([Ap,Xn,Yn,Zn,Xp,Yp,Zp,An]))
Buggy code:
N, M = map(int, input().split())
 
xyz = [[], [], [], [], [], [], [], []]
for i in range(N):
    x, y, z = map(int, input().split())
    xyz[0].append(x+y+z)
    xyz[1].append(x+y-z)
    xyz[2].append(x-y+z)
    xyz[3].append(x-y-z)
    xyz[4].append(-x+y+z)
    xyz[5].append(-x+y-z)
    xyz[6].append(-x-y+z)
    xyz[7].append(-x-y-z)
ans = 0
for i in range(8):
    s = sum(sorted(xyz[i], reverse=True)[0:M])

Fixed code:
N, M = map(int, input().split())

xyz = [[], [], [], [], [], [], [], []]
for i in range(N):
    x, y, z = map(int, input().split())
    xyz[0].append(x+y+z)
    xyz[1].append(x+y-z)
    xyz[2].append(x-y+z)
    xyz[3].append(x-y-z)
    xyz[4].append(-x+y+z)
    xyz[5].append(-x+y-z)
    xyz[6].append(-x-y+z)
    xyz[7].append(-x-y-z)
ans = 0
for i in range(8):
    s = sum(sorted(xyz[i], reverse=True)[0:M])
    ans = max(ans, s)
print(ans)
Buggy code:
import itertools
N,M=map(int,input().split())
x=[0 for i in range(N)]
y=[0 for i in range(N)]
z=[0 for i in range(N)]
for i in range(N):
    x[i],y[i],z[i]=map(int,input().split())
w=[[0 for i in range(N)] for i in range(8)]
S=list(itertools.product([-1,1],repeat=3))
def num(inp):
    res=0
    for i in range(3):
        res+=2*i(inp[i]+1)//2
    return res
for sg in S:
    for i in range(N):
        w[num(sg)][i]=x[i]sg[0]+y[i]sg[1]+z[i]*sg[2]
tmp=[0 for i in range(8)]
for sg in S:
    w[num(sg)].sort(reverse=True)
    for i in range(M):
        tmp[num(sg)]+=w[num(sg)][i]
print(max(tmp))

Fixed code:
import itertools
N,M=map(int,input().split())
x=[0 for i in range(N)]
y=[0 for i in range(N)]
z=[0 for i in range(N)]
for i in range(N):
    x[i],y[i],z[i]=map(int,input().split())
w=[[0 for i in range(N)] for i in range(8)]
S=list(itertools.product([-1,1],repeat=3))
def num(inp):
    res=0
    for i in range(3):
        res+=2**i*(inp[i]+1)//2
    return res
for sg in S:
    for i in range(N):
        w[num(sg)][i]=x[i]*sg[0]+y[i]*sg[1]+z[i]*sg[2]
tmp=[0 for i in range(8)]
for sg in S:
    w[num(sg)].sort(reverse=True)
    for i in range(M):
        tmp[num(sg)]+=w[num(sg)][i]
print(max(tmp))
Buggy code:
n = int(input())
if n > 999:
    print("ABD)
else:
    print("ABC")


Fixed code:
n = int(input())
if n > 999:
    print("ABD")
else:
    print("ABC")
Buggy code:
n = input()
if n >= 1000:
    print("ABD")
else:
    print("ABC")

Fixed code:
n = int(input())
if n >= 1000:
    print("ABD")
else:
    print("ABC")
Buggy code:
n = int(input())
print('ABC' + n if n < 1000 else 'ABD' + n)

Fixed code:
n = int(input())
print('ABC') if n < 1000 else print('ABD')
Buggy code:
#n = int(input())
#n,k = map(int,input().split())
#x = list(map(int,input().split()))

n1 = input()
n = int(n1)+1

if n<=1000:
    print("ABC"+n1)
else:
    print("ABD"+str(n))

Fixed code:
#n = int(input())
#n,k = map(int,input().split())
#x = list(map(int,input().split()))

n1 = input()
n = int(n1)+1

if n<=1000:
    print("ABC")
else:
    print("ABD")
Buggy code:
n = int(input())
if n <= 1000:
    print('ABC')
else:
    print('ABD')

Fixed code:
n=int(input())
if n <1000:
  print('ABC')
else:
  print('ABD')
Buggy code:
N = input()
if N > 999:
    print('ABD')
elif N <= 999:
    print('ABC')

Fixed code:
N = int(input())
if N > 999:
    print('ABD')
elif N <= 999:
    print('ABC')
Buggy code:
input_data = input()
if input_data <= 999:
    print('ABC')
else:
    print('ABD')

Fixed code:
input_data = int(input())
if input_data <= 999:
    print('ABC')
else:
    print('ABD')
Buggy code:
a=input()
if a<1000:
	print('ABC')
else:
	print('ABD')

Fixed code:
a=int(input())
if a<1000:
	print('ABC')
else:
	print('ABD')
Buggy code:
N=int(input())
print("ABC" if N<=1000 else "ABD")

Fixed code:
N = int(input())
ans = 'ABC' if N<1000 else 'ABD'
print(ans)
Buggy code:
N = int(input())
if N <= 1000:
    print('ABC')
else:
    print('ABD')

Fixed code:
N=int(input())
print("ABC" if N<1000 else "ABD")
Buggy code:
a= input()

if (a >= 1000):
    print ("ABD")
else:
    print("ABC")


Fixed code:
a= int(input())

if (a >= 1000):
    print ("ABD")
else:
    print("ABC")
Buggy code:
N = int(input())

if N >= 1000:
    print("ABC")
else:
    print("ABD")

Fixed code:

N=int(input())

if N>=1000:
    print("ABD")
else:
    print("ABC")
Buggy code:
# import bisect
# from collections import Counter, defaultdict, deque
# import copy
# from heapq import heappush, heappop, heapify
# from fractions import gcd
# import itertools
# from operator import attrgetter, itemgetter
# import math

import sys

# import numpy as np

ipti = sys.stdin.readline
MOD = 10 ** 9 + 7
INF = float('INF')
sys.setrecursionlimit(10 ** 5)

def main():
    n = int(input())
    if n < 1000:
        print("ABC"+str(n).zfill(3))
    else:
        n -= 999
        print("ABD"+str(n).zfill(3))

if __name__ == '__main__':
    main()

Fixed code:
# import bisect
# from collections import Counter, defaultdict, deque
# import copy
# from heapq import heappush, heappop, heapify
# from fractions import gcd
# import itertools
# from operator import attrgetter, itemgetter
# import math

import sys

# import numpy as np

ipti = sys.stdin.readline
MOD = 10 ** 9 + 7
INF = float('INF')
sys.setrecursionlimit(10 ** 5)

def main():
    n = int(input())
    if n < 1000:
        print("ABC")
    else:
        print("ABD")

if __name__ == '__main__':
    main()
Buggy code:
n = int(input())

ans = 'ABC' if n <= 999: else 'ABD'

print(ans)

Fixed code:
n = int(input())

ans = 'ABC' if n <= 999 else 'ABD'

print(ans)
Buggy code:
a=input()
if a < 1000:
  print("ABC")
else:
  print("ABD")


Fixed code:
a=int(input())
if a < 1000:
  print("ABC")
else:
  print("ABD")
Buggy code:
a=input()
if a>999:
    print('ABD')
else:
    print('ABC')

Fixed code:
a=int(input())
if (a>999):
    print('ABD')
else:
    print('ABC')
Buggy code:
n = int(input())
if n < 1000:
  print('ABD')
else:
  print('ABC')

Fixed code:
n=int(input())
if n<1000:
	print("ABC")
else:
	print("ABD")
Buggy code:
n=int(input())

if n>1000:
    print("ABD")
else:
    print("ABC")
    
          


Fixed code:
n=int(input())

if n>=1000:
    print("ABD")
else:
    print("ABC")
Buggy code:
a=input()
print("ABC" if a<1000 else "ABD")

Fixed code:
a=int(input())
print("ABC" if a<1000 else "ABD")
Buggy code:
N=int(input())
a='ABD'
b='ABC'
if a<=999:
  print(b)
else:
  print(a)

Fixed code:
N=int(input())
a='ABD'
b='ABC'

if N<=999:
  print(b)
else:
  print(a)
Buggy code:
N = int(input())

if N > 1000:
  print("ABD")
else:
  print("ABC")

Fixed code:
N = int(input())

if N >= 1000:
    print("ABD")
else :
    print("ABC")
Buggy code:
N=int(input())
N=1000
if N>=1000:
  print("ABD")
else:
  print("ABC")

Fixed code:
if int(input()) >=1000:
  print("ABD")
else:
  print("ABC")
Buggy code:
int n = input()
print("ABC" if n < 1000 else "ABD")

Fixed code:
n = int(input())

print('ABC' if n < 1000 else 'ABD')
Buggy code:
n = int(input())
if n > 1000:
  print("ABD")
else:
  print("ABC")

Fixed code:
n = int(input())
print("ABD") if n >= 1000 else print("ABC")
Buggy code:
if(int(input()) 1000):
  print("ABC")
else:
  print("ABD")
  

Fixed code:
if(int(input()) < 1000):
  print("ABC")
else:
  print("ABD")
Buggy code:
a=input()
if a<=999:
    print("ABC")
else:
    print("ABD")

Fixed code:
a=int(input())
if a<=999:
    print("ABC")
else:
    print("ABD")
Buggy code:
N=int(input())
if N>=1000:
    print('ABD')
else:
    print('ABD')

Fixed code:
N = int(input())
if N >= 1000:
    print("ABD")
else:
    print("ABC")
Buggy code:
a = input()
b = int(a)
if b < 1000 :
    print "ABC"
else:
    print "ABD"

Fixed code:
a = int(input())
if a < 1000:
  print('ABC')
else:
  print('ABD')
Buggy code:
N = int(input())            
if N > 999:                 
    print("ABD")            
else:                       
    pritn("ABC")            


Fixed code:
N = int(input())            
if N > 999:                 
    print("ABD")            
else:                       
    print("ABC")
Buggy code:
#https://atcoder.jp/contests/abc099/tasks/abc099_a

a = int(input())

if a <= 99:
    print("ABC")
else:
    print("ABD")

Fixed code:
#https://atcoder.jp/contests/abc099/tasks/abc099_a

a = int(input())

if a <= 999:
    print("ABC")
else:
    print("ABD")
Buggy code:
line = input()

num = int(line)

if line < 1000:
    print("ABC")
else:
    print("ABD")

Fixed code:
line = input()

num = int(line)

if num < 1000:
    print("ABC")
else:
    print("ABD")
Buggy code:
print('ABC' if int(input()) <= 1000 else 'ABD')

Fixed code:
print("ABC" if (int(input())<1000) else "ABD")
Buggy code:
a = input()

if a < 1000 :
    print("ABC")
else :
    print("ABD")

Fixed code:
a = int(input())

if a < 1000 :
    print("ABC")
else :
    print("ABD")
Buggy code:
import sys
input = sys.stdin.buffer.readline

def gcd(a: int, b: int):
    """ https://cocodrips.hateblo.jp/entry/2014/03/05/143623
    """
    while b:
        a, b = b, a%b
    return a

def lcm(a: int, b: int):
    return a * b // gcd(a, b)


def main():
    N = int(input())
	#N, M = map(int, input().split())
    #print(lcm(N, M))
	print("ABC" if N<1000 else "ABD")

if __name__ == "__main__":
    main()


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

def gcd(a: int, b: int):
    """ https://cocodrips.hateblo.jp/entry/2014/03/05/143623
    """
    while b:
        a, b = b, a%b
    return a

def lcm(a: int, b: int):
    return a * b // gcd(a, b)


def main():
    N = int(input())
    #N, M = map(int, input().split())
    #print(lcm(N, M))
    print("ABC" if N<1000 else "ABD")


if __name__ == "__main__":
    main()
Buggy code:
# -*- coding: utf-8 -*-

n = input()

print('ABD' + n if int(n) >= 1000 else 'ABC' + n)

Fixed code:
# -*- coding: utf-8 -*-

n = input()

print('ABD' if int(n) >= 1000 else 'ABC')
Buggy code:
i=input()
if i<1000:
  print('ABC')
else:
  print('ABD')

Fixed code:
i=int(input())
if i<1000:
  print('ABC')
else:
  print('ABD')
Buggy code:
# -*- coding: utf-8 -*-
N = int(input())
if N > 1000:
  print(ABD)
else:
  print(ABC)

Fixed code:
# -*- coding: utf-8 -*-
N = int(input())
if N >=  1000:
  print("ABD")
else:
  print("ABC")
Buggy code:
A=int(input())
if A > 999:
  print("ABD" + str(A-1000+1))
else :
  print("ABC" + str(A))




Fixed code:
A=int(input())
if A > 999:
  print("ABD" )#+ str(A-1000))
else :
  print("ABC")# + str(A))
Buggy code:
n = int(input())

if N <=999:
    print("ABC")
else:
    print("ABD")

Fixed code:
N = int(input())

if(N<=999):
    print('ABC')
else:
    print('ABD')
Buggy code:
num = input()
if num < 1000:
  print('ABC')
else:
  print('ABD')

Fixed code:
num = int(input())
if num < 1000:
   print('ABC')
else:
   print('ABD')
Buggy code:
N = int(input())
if N < 999:
  print("ABD")
else:
  print("ABC")

Fixed code:
N =int(input())
if N<=999:
    print("ABC")
else:
    print("ABD")
Buggy code:
import sys


def input():
    return sys.stdin.readline()[:-1]

# N = int(input())
# A = [int(x) for x in input().split()]
# a, b, c = map(int, input().split())
# name1 = str(input())
# alph = {"A": 1, "B": 2, "C": 3, "D": 4, "E": 5}
n = int(input())
if n>999:
    print("ABC")
else:
    print("ABD")

Fixed code:
import sys


def input():
    return sys.stdin.readline()[:-1]

# N = int(input())
# A = [int(x) for x in input().split()]
# a, b, c = map(int, input().split())
# name1 = str(input())
# alph = {"A": 1, "B": 2, "C": 3, "D": 4, "E": 5}
n = int(input())
if n<1000:
    print("ABC")
else:
    print("ABD")
Buggy code:
from sys import stdin
input = stdin.readline

def VI(N, init=0):
  return [init for _ in range(N)]
def VVI(N, M, init=0):
  return [[init for _ in range(M)] for _ in range(N)]

def VD(N, init=0.0):
  return [init for _ in range(N)]
def VVD(N, M, init=0.0):
  return [[init for _ in range(M)] for _ in range(N)]

def Decimal(x):
  print("{0:.10f}".format(x))

class Pair:
  def __init__(self, x=0, y=0):
    self.first = x
    self.second = y

  def __repr__(self):
    return '{0} {1}'.format(self.first, self.second)

  def __lt__(self, pi):
    return self.first < pi.second

def POW(x, n):
  ret = 1
  while n:
    if n&1:
      ret *= x
    x *= x
    n >>= 1
  return ret

N = int(input().rsplit())
if N < 1000:
  print("ABC")
else:
  print("ABD")


Fixed code:
from sys import stdin
input = stdin.readline

def VI(N, init=0):
  return [init for _ in range(N)]
def VVI(N, M, init=0):
  return [[init for _ in range(M)] for _ in range(N)]

def VD(N, init=0.0):
  return [init for _ in range(N)]
def VVD(N, M, init=0.0):
  return [[init for _ in range(M)] for _ in range(N)]

def Decimal(x):
  print("{0:.10f}".format(x))

class Pair:
  def __init__(self, x=0, y=0):
    self.first = x
    self.second = y

  def __repr__(self):
    return '{0} {1}'.format(self.first, self.second)

  def __lt__(self, pi):
    return self.first < pi.second

def POW(x, n):
  ret = 1
  while n:
    if n&1:
      ret *= x
    x *= x
    n >>= 1
  return ret

N = int(input().rstrip())
if N < 1000:
  print("ABC")
else:
  print("ABD")
Buggy code:
suuzi = int(input())

if a < 1000:
    print("ABC")
else:
    print("ABD")

Fixed code:
a=int(input())

if a<1000:
  print("ABC")
else :
  print("ABD")
Buggy code:
# -*- coding: utf-8 -*-
n = int(input())

if n < 1000:
    print(ABC)
else:
    print(ABD)

Fixed code:
# -*- coding: utf-8 -*-
n = int(input())

if n < 1000:
    print('ABC')
else:
    print('ABD')
Buggy code:
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap


@mt
def slv(N, AB):
    ans = 0
    return ans


def main():
    N = read_int()
    if N > 999:
        print('ABD')
    print('ABC')


if __name__ == '__main__':
    main()


Fixed code:
# -*- coding: utf-8 -*-
import bisect
import heapq
import math
import random
import sys
from collections import Counter, defaultdict
from decimal import ROUND_CEILING, ROUND_HALF_UP, Decimal
from functools import lru_cache, reduce
from itertools import combinations, combinations_with_replacement, product


def read_int():
    return int(input())


def read_int_n():
    return list(map(int, input().split()))


def read_float():
    return float(input())


def read_float_n():
    return list(map(float, input().split()))


def read_str():
    return input()


def read_str_n():
    return list(map(str, input().split()))


def error_print(*args):
    print(*args, file=sys.stderr)


def mt(f):
    import time

    def wrap(*args, **kwargs):
        s = time.time()
        ret = f(*args, **kwargs)
        e = time.time()

        error_print(e - s, 'sec')
        return ret

    return wrap


@mt
def slv(N, AB):
    ans = 0
    return ans


def main():
    N = read_int()
    if N > 999:
        print('ABD')
    else:
        print('ABC')


if __name__ == '__main__':
    main()
Buggy code:
N = int(input())
if N >=1000:
  print('ABD'
else:
  print('ABC')

Fixed code:
N = int(input())
if N >=1000:
  print('ABD')
else:
  print('ABC')
Buggy code:
n = int(input())
print("ABC" if 1000<n else "ABD")

Fixed code:
n=int(input());print('ABC' if n<1000 else'ABD')
Buggy code:
N = int(input())
if N >= 1000:
    print('ABC')
else:
    print('ABC')

Fixed code:
N=int(input())

if N>=1000:
  print("ABD")
else:
  print("ABC")
Buggy code:
n = int(input())

if n > 999:
    print('ABD)
else:
    print('ABC')

Fixed code:
n = int(input())

if n > 999:
    print('ABD')
else:
    print('ABC')
Buggy code:
n = int(input())

if n < 999:
	print('ABC')
else:
	print('ABD')

Fixed code:
n = int(input())

if(n <= 999):
    print("ABC")
else:
    print("ABD")
Buggy code:
N=int(input())
if 1<N<999:
    print("ABC")
else:
    print("ABD")

Fixed code:
N= int( input())
if N <= 999:
    print('ABC')

else:
    print('ABD')
Buggy code:
N = int(input())
under = "ABC"
over = "ABD"

if N > 1000:
#  tmp = str(N-1000)
  print(over)
else:
#  tmp = str(N)
  print(under)

Fixed code:
N = int(input())
under = "ABC"
over = "ABD"

if N > 1000:
#  tmp = str(N-1000)
  print(over)
elif N == 1000:
  print("ABD")
else:
#  tmp = str(N)
  print(under)