Harryxun/testdata huggingface dataset:
Buggy python submission (verdict: Time Limit Exceeded):
n=int(input())
a=list(map(int,input().split()))
q=int(input())
bc=[]
for i in range(q):
  b,c=map(int,input().split())
  bc.append([b,c])
for i in range(q):
  if bc[i][0] in a:
    for k in range(len(a)):
      if a[k]==bc[i][0]:
        a[k]=bc[i][1]
  print(sum(a))
      
   



Fixed submission:
n=int(input())
a=list(map(int,input().split()))
q=int(input())
from collections import Counter
a_count=Counter(a)
sum=sum(a)
for i in range(q):
  b,c=map(int,input().split())
  if b in a_count:
    sum+=(c-b)*a_count[b]
    a_count[c]+=a_count[b]
    a_count.pop(b)
  print(sum)
Buggy python submission (verdict: Runtime Error):
n=int(input())
a=list(int(input()))
ans=1
if 0 in a:
  print(0)
else:
  for i in range(n):
    ans*=a[i]
    if ans>10**18:
      print(-1)
      exit()
  print(ans)
  
  
  
       
       

Fixed submission:
n=int(input())
a=list(map(int,input().split()))
ans=1
if 0 in a:
  print(0)
else:
  for i in range(n):
    ans*=a[i]
    if ans>10**18:
      print(-1)
      exit()
  print(ans)

Buggy python submission (verdict: Time Limit Exceeded):
n=int(input())
a=list(map(int,input().split()))
mul=1
for i in range(n):
       mul*=a[i]
if mul<=10**18:
  print(mul)
else:
  print('-1')
       


Fixed submission:
n=int(input())
a=list(map(int,input().split()))
ans=1
if 0 in a:
  print(0)
else:
  for i in range(n):
    ans*=a[i]
    if ans>10**18:
      print(-1)
      exit()
  print(ans)
Buggy python submission (verdict: Runtime Error):
from fractions import Fraction
a,b=input().split()
A=float(a)
B=Fraction(b)
print(floor(A*B))



Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))

Buggy python submission (verdict: Runtime Error):
from fractions import Fraction
a,b=input().split()
A=float(a)
B=Fraction(b)
print(int(a*b))

Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))

Buggy python submission (verdict: Runtime Error):
a,b=input().split()
A=int(a)
B=float(100*b)
ans=A*B/100
print(int(ans))



Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))

Buggy python submission (verdict: Runtime Error):
a,b=input().split()
A=int(a)
B=float(b)
ans=a*(b*100)/100
print(int(ans))


Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))

Buggy python submission (verdict: Runtime Error):
a,b=input().split()
A=int(a)
B=float(b)
print(A*B*100)/100

Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))

Buggy python submission (verdict: Runtime Error):
a,b=map(int,input().split())
print(int(a*b))

Fixed submission:
from math import floor
from fractions import Fraction
a, b = input().split()
a = int(a)
b = Fraction(b)
print(floor(a * b))
Buggy python submission (verdict: Runtime Error):
s=list(input())
t=list(input())
if s[0:-1]==t[0:-2] and len(s)+1==len(t)　and t[-1].islower()==True:
  print('Yes')
  
else:
  print('No')



Fixed submission:
import copy
s=list(input())
t=list(input())

if len(s)==len(t)-1 and t[:len(s)]==s:
  print('Yes')
else:
  print('No')
Buggy python submission (verdict: Time Limit Exceeded):
x=int(input())
times=0
money=100
while money<x:
  money*1.01
  times+=1
  
print(times)

Fixed submission:
x= int(input())
save=100
k=0
while save<x:
  save= int(save*1.01)
  k+=1
  
print(k)
Buggy python submission (verdict: Time Limit Exceeded):
a,b,n= map(int,input().split())
t=[]
for k in range (n+1):
  s= int(a*k/b)-a*int(k/b)
  t.append(s)
  if k>=b:
    break
print(max(t))
  


Fixed submission:
import math
a, b, n = map(int, input().split())

if n < b-1:
    x = n
else:
    x = b-1

m = math.floor(a*x/b) - a*math.floor(x/b)
print(m)

Buggy python submission (verdict: Time Limit Exceeded):
a,b,n= map(int,input().split())
t=[]
for k in range (n+1):
  s= int(a*k/b)-a*int(k/b)
  t.append(s)
  
print(max(t))
  

Fixed submission:
import math
a, b, n = map(int, input().split())

if n < b-1:
    x = n
else:
    x = b-1

m = math.floor(a*x/b) - a*math.floor(x/b)
print(m)
Buggy python submission (verdict: Runtime Error):
S, W = map(int, input().split())
if S =< W:
  print('unsafe')
  
else:
  print('safe')

Fixed submission:
S, W = map(int, input().split())
if S <= W:
  print('unsafe')
  
else:
  print('safe')

Buggy python submission (verdict: Runtime Error):
S = input()
W = input()
if int(S) =< int(W):
  print('unsafe')
  
else: 
  print('safe)

Fixed submission:
S, W = map(int, input().split())
if S <= W:
  print('unsafe')
  
else:
  print('safe')

Buggy python submission (verdict: Runtime Error):
if S =< W :
  print('unsafe')
 
else:
  print('safe')


Fixed submission:
S, W = map(int, input().split())
if S <= W:
  print('unsafe')
  
else:
  print('safe')

Buggy python submission (verdict: Runtime Error):
if int('S') =< int('W') :
  print('unsafe')
 
else:
  print('safe')

Fixed submission:
S, W = map(int, input().split())
if S <= W:
  print('unsafe')
  
else:
  print('safe')
Buggy python submission (verdict: Runtime Error):
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  c -= b
  a -= d
  
  

if a>>o:
  print("Yes")
  
else:
  print("No")
  
  


Fixed submission:
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  c -= b
  a -= d
  
  
if c<=0:
  print("Yes")
  
else:
  print("No")

Buggy python submission (verdict: Runtime Error):
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  c -= b
  a -= d
  
  

if a>o:
  print("Yes")
  
else:
  print("No")
  
  


Fixed submission:
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  c -= b
  a -= d
  
  
if c<=0:
  print("Yes")
  
else:
  print("No")

Buggy python submission (verdict: Runtime Error):
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  a -= d
  c -= b
  

if a>o:
  print("Yes")
  
else:
  print("No")
  
  

Fixed submission:
a, b, c, d = map(int, input().split())

while a>0 and c>0:
  c -= b
  a -= d
  
  
if c<=0:
  print("Yes")
  
else:
  print("No")
Buggy python submission (verdict: Runtime Error):
n= input()
s=[]
for i in range(n):
  s.append(input())
  
print(set(s))


Fixed submission:
n= int(input())
s=[]
for i in range(n):
  s.append(input())
  
print(len(set(s)))

Buggy python submission (verdict: Runtime Error):
n= int(input())
s=[]
for i in range(n):
  s.append(int(input()))
  
print(set(s))

Fixed submission:
n= int(input())
s=[]
for i in range(n):
  s.append(input())
  
print(len(set(s)))
Buggy python submission (verdict: Runtime Error):
from math import pi

r = input()

print(2*r*pi)

Fixed submission:
from math import pi

r = int(input())

print(2*r*pi)

Buggy python submission (verdict: Runtime Error):
import math

R = input()

print(R*R*math.pi)


Fixed submission:
from math import pi

r = int(input())

print(2*r*pi)

Buggy python submission (verdict: Runtime Error):
from math import pi

R = input()

print(R*R*pi)

Fixed submission:
from math import pi

r = int(input())

print(2*r*pi)
Buggy python submission (verdict: Runtime Error):
n,m= map(int,input().split())
a = list(map(int,input().split()))

hwdsum=0
k=0
while k<= m-1:
  sum += a[k]
  
if n-sum>=0:
  print(str(sum))
  
else:
  print(-1)



Fixed submission:
n,m= map(int,input().split())
a = list(map(int,input().split()))

hwdsum=0
k=0
while k<= m-1:
  hwdsum += a[k]
  k+=1
  
if n-hwdsum>=0:
  print(str(n-hwdsum))
  
else:
  print(str(-1))
Buggy python submission (verdict: Time Limit Exceeded):
from math import gcd
k=int(input())
cnt=0
for i in range(1,k+1):
  for p in range(1,k+1):
    for q in range(1,k+1):
      gcd1=gcd(i,p)
      gcd2=gcd(p,q)
      cnt+=gcd(gcd1,gcd2)

      
print(cnt)
  



Fixed submission:
from math import gcd
k=int(input())
cnt=0
for i in range(1,k+1):
  for p in range(1,k+1):
    for q in range(1,k+1):
      gcd1=gcd(i,p)
      
      cnt+=gcd(gcd1,q)

      
print(cnt)

Buggy python submission (verdict: Runtime Error):
from math import gcd
k=int(input())
cnt=0
for i in range(k):
  for p in range(k):
    for q in range(k):
      cnt+=gcd(i,p,q)
      
print(cnt)
  

Fixed submission:
from math import gcd
k=int(input())
cnt=0
for i in range(1,k+1):
  for p in range(1,k+1):
    for q in range(1,k+1):
      gcd1=gcd(i,p)
      
      cnt+=gcd(gcd1,q)

      
print(cnt)
Buggy python submission (verdict: Runtime Error):
s =input()
if s[2] == s[3] and s[4] == s[5]:
  print("Yes")
  
else:
  print"No")


Fixed submission:
s =list(input())
if s[2] == s[3] and s[4] == s[5]:
  print("Yes")
  
else:
  print("No")

Buggy python submission (verdict: Runtime Error):
s = list(input())
if s[2] == s[3] and s[4] == s[5]:
  print("Yes")
  
else:
  print"No")


Fixed submission:
s =list(input())
if s[2] == s[3] and s[4] == s[5]:
  print("Yes")
  
else:
  print("No")

Buggy python submission (verdict: Runtime Error):
s = list(input())
if s[2] = s[3] and s[4] = s[5]:
  print("Yes")
  
else:
  print"No")

Fixed submission:
s =list(input())
if s[2] == s[3] and s[4] == s[5]:
  print("Yes")
  
else:
  print("No")
Buggy python submission (verdict: Runtime Error):
n=int(input())
a=[int(input()) for i in range(n)]
if len(a)==len(set(a)):
  print('Yes')
else:
  print('No')
  

Fixed submission:
n=int(input())
a=list(map(int,input().split()))
A=set(a)
if len(a)==len(A):
  print('YES')
else:
  print('NO')
Buggy python submission (verdict: Time Limit Exceeded):
n,k=map(int,input().split())
p=list(map(int,input().split()))
maxy=0
for i in range(n-k+1):
  temp=0
  for q in range(k):
    temp+=p[i+q]
  
  if temp>maxy:
    maxy=temp
    
print((maxy+k)/2)
  



Fixed submission:
n,k= map(int, input().split())
p = list(map(int, input().split()))
ans = sum(p[:k])
q = [ans]
for i in range(k,n):
  ans = ans+p[i]-p[i-k]
  q.append(ans)
print((max(q)+k)/2)

Buggy python submission (verdict: Runtime Error):
n,k=map(int,input().split())
p=list(int(input()))
maxy=0
for i in range(n-k):
  for q in range(k):
    temp+=p[i+q]
  if temp>maxy:
    maxy=temp
    
print(maxy/2)
  

Fixed submission:
n,k= map(int, input().split())
p = list(map(int, input().split()))
ans = sum(p[:k])
q = [ans]
for i in range(k,n):
  ans = ans+p[i]-p[i-k]
  q.append(ans)
print((max(q)+k)/2)
Buggy python submission (verdict: Runtime Error):
n=int(input())
p=list(map(int,input(),split()))
q=list(map(int,input(),split()))
from itertools import permutations
list=list(permutations(range(1,n+1)))
ans=abs(list.index(p)-list.index(q))

Fixed submission:
N = int(input())
P = tuple(map(int, input().split()))
Q = tuple(map(int, input().split()))
 
from itertools import permutations as per
tuples = per(range(1, N+1))
 
a = 0
b = 0
for i, t in enumerate(tuples):
    if t == P:
        a = i
    if t == Q:
        b = i
print(abs(a - b))
Buggy python submission (verdict: Time Limit Exceeded):
from math import sqrt
a,b=map(int,input().split())
c=a*b
for i in range(1,int(sqrt(max(a,b)))):
  while a%i==0 and b%i == 0:
    c=c/i
    
print(c)

Fixed submission:
import fractions
a,b=map(int,input().split())
c=fractions.gcd(a,b)
print(int(a*b/c))
Buggy python submission (verdict: Runtime Error):
s=list(input())
if len(s)%2==0:
  c=len(s)/2
  d=i*(-1)-1
  sum=0
  for i in range(c):
    if s[i]!=s[d]:
      sum+=1
  print(sum)
else:
  sum2=0
  e=(len(s)-1)/2
  f=i*(-1)-1
  for i in range(e):
    if s[i]!=s[f]:
      sum2+=1
  print(sum2)

Fixed submission:
def resolve():
    S = input()
    s = len(S)
    count = 0
    if s%2 == 0:
        for i in range(s//2):
            if S[i] != S[(i+1)*-1]:
                count += 1
    else:
        for i in range((s-1)//2):
            if S[i] != S[(i+1)*-1]:
                count += 1
    print(count)
resolve()
Buggy python submission (verdict: Runtime Error):
n=int(input())
s=list(input())
Len=len(s)/2
if len(s)%2==1:
  print('No')
else:
  for i in range(Len):
    if s[i]!=s[i+Len]:
      print('No')
      break
  print('Yes')

Fixed submission:
n=int(input())
s=list(input())
Len=int(len(s)/2)
if len(s)%2==1:
  print('No')
else:
  for i in range(Len):
    if s[i]!=s[i+Len]:
      print('No')
      exit()
  print('Yes')
Buggy python submission (verdict: Runtime Error):
a = int(input())
b = int(input())
if a<10 and b<10:
  print(a*b)

  
else:
  print('-1')


Fixed submission:
a,b = map(int,input().split())

if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')

Buggy python submission (verdict: Runtime Error):
a = int(input())
b = int(input())
if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')


Fixed submission:
a,b = map(int,input().split())

if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')

Buggy python submission (verdict: Runtime Error):
a = int(input())
b = int(input())
if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')

Fixed submission:
a,b = map(int,input().split())

if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')

Buggy python submission (verdict: Runtime Error):
a,b = map(int,input())
if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')

Fixed submission:
a,b = map(int,input().split())

if a<10 and b<10:
  print(a*b)
  
else:
  print('-1')
Buggy python submission (verdict: Time Limit Exceeded):
import math
n,m=map(int,input().split())
a=list(map(int,input().split()))
a.sort()
for i in range(m):
  c=math.floor(a[-1]/2)
  a[-1]=c
  a.sort()
 
sum=0
for i in range(n):
  sum+=a[i]
  
print(sum)
  


Fixed submission:
from heapq import heapify, heappop, heappush

N, M = map(int, input().split())
A = [-1*int(i) for i in input().split()]
heapify(A)

for i in range(M):
    n = -1 * heappop(A)
    heappush(A, -1*(n//2))

print(-1*sum(A))

Buggy python submission (verdict: Time Limit Exceeded):
import math
n,m=map(int,input().split())
a=list(map(int,input().split()))
a.sort()
for i in range(m):
  c=math.floor(max(a)/2)
  a.remove(a[-1])
  a.append(c)
  a.sort()
 
sum=0
for i in range(n):
  sum+=a[i]
  
print(sum)
  

Fixed submission:
from heapq import heapify, heappop, heappush

N, M = map(int, input().split())
A = [-1*int(i) for i in input().split()]
heapify(A)

for i in range(M):
    n = -1 * heappop(A)
    heappush(A, -1*(n//2))

print(-1*sum(A))

Buggy python submission (verdict: Runtime Error):
import math
n,m=map(int,input().split())
a=list(map(int,input().split()))
a.sort()
for i in ragne(m):
  c=math.floor(max(a)/2)
  a.remove(a[-1])
  a.append(c)
  a.sort()
 
sum=0
for i in range(n):
  sum+=a[i]
  
print(sum)
  

Fixed submission:
from heapq import heapify, heappop, heappush

N, M = map(int, input().split())
A = [-1*int(i) for i in input().split()]
heapify(A)

for i in range(M):
    n = -1 * heappop(A)
    heappush(A, -1*(n//2))

print(-1*sum(A))
Buggy python submission (verdict: Runtime Error):
a,b=map(int,input().split())
c=(b-1)//(a-1)
if c-int(c)=0:
  print(str(c))
  
else:
  print(c+1)
  


Fixed submission:
a,b=map(int,input().split())
c=(b-1)/(a-1)
if c-int(c)==0:
  print(int(c))

else:
  print(int(c)+1)
Buggy python submission (verdict: Time Limit Exceeded):
n=int(input())
list=[input() for i in range(n)]
lists=[]
for i in list:
  lists.append(''.join(sorted(i)))
  
#ここまででソートしたリストを得た。ここまではオーケー
cnt=0
for i in range(n):
  for k in range(i+1,n):
    if lists[i]==lists[k]:
        cnt+=1
  
  
print(cnt)



Fixed submission:
n = int(input())

words = {}
anagrams = 0

for i in range(n):
    word = "".join(sorted(input()))
    if word not in words:
        words[word] = 1
    else:
        anagrams += words[word]
        words[word] += 1

print(anagrams)

Buggy python submission (verdict: Runtime Error):
n=int(inpput())
list=[input() for i in range(n)]
lists=[]
for i in list:
  lists.append(''.join(sorted(i)))
  
print(len(lists)-len(set(lists)))

Fixed submission:
n = int(input())

words = {}
anagrams = 0

for i in range(n):
    word = "".join(sorted(input()))
    if word not in words:
        words[word] = 1
    else:
        anagrams += words[word]
        words[word] += 1

print(anagrams)
Buggy python submission (verdict: Runtime Error):
n=int(input())
d=list(map(int,input().split()))
d.sort()
ans=d[m]-d[m-1]
print(ans+1)


Fixed submission:
n=int(input())
d=list(map(int,input().split()))
d.sort()
m=int(n/2)
ans=d[m]-d[m-1]
print(ans)
Buggy python submission (verdict: Runtime Error):
w,h,x,y=map(int,input()split())
area=w*h/2
if x==w/2 and y==h/2:
  print(area, '1')
else:
  print(area, '0')

Fixed submission:
w,h,x,y=map(int,input().split())
area=w*h/2
if x==w/2 and y==h/2:
  print(area, '1')
else:
  print(area, '0')
Buggy python submission (verdict: Runtime Error):
n1, n2, n3, n4=map(int,input().split())
n=[]
n.append(n1, n2, n3, n4)
if 1, ,7 ,9, 4 in n:
  print('YES')
else:
  print('NO')

Fixed submission:
n1, n2, n3, n4=map(int,input().split())
n=[]
n.append(n1)
n.append(n2)
n.append(n3)
n.append(n4)
if 1 in n and 7 in n and 9 in n and 4 in n:
  print('YES')
else:
  print('NO')
Buggy python submission (verdict: Runtime Error):
n, k=map(int,input().split())
a=[input() for i in range(n)]
a.sort()
b=[]
for p in range(n-k):
  c=a[p+k]-a[p]
  b.append(c)
  
print(min(b))
  

Fixed submission:
n, k=map(int,input().split())
a=[int(input()) for i in range(n)]
a.sort()
b=[]
for p in range(n-k+1):
  c=a[p+k-1]-a[p]
  b.append(c)
  
print(min(b))
Buggy python submission (verdict: Runtime Error):
s=list(input())
k=int(input())
mi=5*(10**14)
i=0
while k>=0:
  k-=s[i]*mi
  i+=1
print(s[i])

Fixed submission:
import sys
s=input()
k=int(input())
for i in range(len(s)):
    if s[i]!="1":
        print(s[i])
        sys.exit()
    if s[i]=="1" and i+1==k:
        print(1)
        sys.exit()

Buggy python submission (verdict: Runtime Error):
s=list(input())
k=int(input())
ss=[]
t=5*(10**15)
for i in range(len(s)):
               ss.append(int(s[i]))
for i in range(len(s)):
  k-=ss[i]**t
  if k<ss[i+1]:
    print(ss[i+1])
    break
  elif k==0:
    print(ss[i])
    break
    



Fixed submission:
import sys
s=input()
k=int(input())
for i in range(len(s)):
    if s[i]!="1":
        print(s[i])
        sys.exit()
    if s[i]=="1" and i+1==k:
        print(1)
        sys.exit()

Buggy python submission (verdict: Runtime Error):
s=list(input())
k=int(input())
ss=[]
for i in range(len(s)):
               ss.append(int(s[i]))
for i in range(len(s)):
  k-=ss[i]*5*(10**15)
  if k<ss[i+1]:
    break
    
print(s[i+1])
    




Fixed submission:
import sys
s=input()
k=int(input())
for i in range(len(s)):
    if s[i]!="1":
        print(s[i])
        sys.exit()
    if s[i]=="1" and i+1==k:
        print(1)
        sys.exit()

Buggy python submission (verdict: Runtime Error):
s=list(int(input()))
k=int(input())
for i in range(len(s)):
  k-=s[i]*5(10**15)
  if k<s[i+1]:
    break
    
print(s[i+1])
    


Fixed submission:
import sys
s=input()
k=int(input())
for i in range(len(s)):
    if s[i]!="1":
        print(s[i])
        sys.exit()
    if s[i]=="1" and i+1==k:
        print(1)
        sys.exit()
Buggy python submission (verdict: Runtime Error):
import copy
s=list(input())
if s[0]=='A' and 'C' in s[2:len(s)] :
  t=copy.copy(s)
  s.remove('A')
  s.remove('C')
  result=''.join(s)
  if len(s)==len(t)-2 and result.islower()==True and t[len(s-1)]!='C':
    print('AC')
  else:
    print('WA')
    
else:
  print('WA')


Fixed submission:
import copy
s=list(input())
if s[0]=='A' and 'C' in s[2:len(s)] :
  t=copy.copy(s)
  s.remove('A')
  s.remove('C')
  result=''.join(s)
  if len(s)==len(t)-2 and result.islower()==True and t[-1]!='C':
    print('AC')
  else:
    print('WA')
    
else:
  print('WA')

Buggy python submission (verdict: Runtime Error):
import copy
s=list(input())
if s[0]=='A' and 'C' in s[2:len(s)] :
  t=copy.copy(s)
  s.remove('A')
  s.remove('C')
  result=''.join(s)
  if len(s)==len(t)-2 and result.islower()==True and t[s-1]!='C':
    print('AC')
  else:
    print('WA')
    
else:
  print('WA')


Fixed submission:
import copy
s=list(input())
if s[0]=='A' and 'C' in s[2:len(s)] :
  t=copy.copy(s)
  s.remove('A')
  s.remove('C')
  result=''.join(s)
  if len(s)==len(t)-2 and result.islower()==True and t[-1]!='C':
    print('AC')
  else:
    print('WA')
    
else:
  print('WA')
Buggy python submission (verdict: Runtime Error):
n=int(input())
a=list(map(int,input().split()))
cnt=0
for i in range(n):
  while a[i]%2=0:
    a[i]=a[i]/2
    cnt+=1
    
print(cnt)
  

Fixed submission:
n=int(input())
a=list(map(int,input().split()))
cnt=0
for i in range(n):
  while a[i]%2==0:
    a[i]=a[i]/2
    cnt+=1
    
print(cnt)
Buggy python submission (verdict: Runtime Error):
a,b,c,k=map(int,input().split())
if a-b>10**18:
  print("Unfair")
else:
  if k%2=1:
    print(a-b)
  else:
    print(b-a)
  


Fixed submission:
a,b,c,k=map(int,input().split())
if a-b>10**18:
  print("Unfair")
else:
  if k%2==0:
    print(a-b)
  else:
    print(b-a)

Buggy python submission (verdict: Runtime Error):
a,b,c,k=map(int,input().split())
if a-b>10**8:
  print("Unfair")
else:
  print(a-b if k%2=1 else b-a)
  


Fixed submission:
a,b,c,k=map(int,input().split())
if a-b>10**18:
  print("Unfair")
else:
  if k%2==0:
    print(a-b)
  else:
    print(b-a)
Buggy python submission (verdict: Runtime Error):
n=list(input())
n_list=[int(i) for i in n]
if n_list[0]!=1 and set(n_list)!=[9]:
  ans=9*(len(n_list)-1)+n_list[0]-1
  print(ans)
elif n_list[0]!=1 and set(n_list)==[9]:
  ans=len(n_list)*9
  print(ans)
elif n_list[0]+n_list[1]<=9:
  ans=(len(n_list)-1)*9
  print(ans)
else:
  ans=n_list[0]+n_list[1]-1+9*(len(n_list)-2)
  print(ans)
  
  



Fixed submission:
N = input()
ans = 0

if N[1:] == "9" * (len(N) - 1):
    ans = int(N[0]) + (9 * (len(N) - 1))
else:
    ans = int(N[0]) + 9 * (len(N) - 1) - 1

print(ans)

Buggy python submission (verdict: Runtime Error):
n=list(input())
n_list=[int(i) for i in n]
if n_list[0]!=1 and set(n_list)!=[9]:
  ans=9*(len(n_list)-1)+n_list[0]-1
  print(ans)
elif n_list[0]!=1 and set(n_list)==[9]:
  print(9*len(n_list))
elif n_list[0]+n_list[1]<=9:
  ans=(len(n_list)-1)*9
  print(ans)
else:
  ans=n_list[0]+n_list[1]-1+9*(len(n_list)-2)
  print(ans)
  
  



Fixed submission:
N = input()
ans = 0

if N[1:] == "9" * (len(N) - 1):
    ans = int(N[0]) + (9 * (len(N) - 1))
else:
    ans = int(N[0]) + 9 * (len(N) - 1) - 1

print(ans)

Buggy python submission (verdict: Runtime Error):
n=list(input())
n_list=[int(i) for i in n]
if n_list[0]!=1 and set(n_list)!=[9]:
  ans=9*(len(n_list)-1)+n_list[0]-1
  print(ans)
elif n_list[0]!=1 and set(n_list)==[9]:
  print(9*len(n_list))
elif n_list[0]+n_list[1]<=9:
  ans=(len(n_list)-1)*9
else:
  ans=n_list[0]+n_list[1]-1+9*(len(n_list)-2)
  
  

Fixed submission:
N = input()
ans = 0

if N[1:] == "9" * (len(N) - 1):
    ans = int(N[0]) + (9 * (len(N) - 1))
else:
    ans = int(N[0]) + 9 * (len(N) - 1) - 1

print(ans)
Buggy python submission (verdict: Runtime Error):
n=int(input())
a=list(map(int,input().split()))
a.sort() 
alice_sum=0
bob_sum=0
if len(a)%2==0:
  for i in range(,n,2):
    bob_sum+=a[i]
  for l in range(1,n,2):
    alice_sum+=a[i]
else:
  for i in range(,n,2):
    alice_sum+=a[i]
  for k in range(1,n,2):
    bob_sum+=a[i]
    
print(alice_sum-bob_sum)

Fixed submission:
n=int(input())
a=list(map(int,input().split()))
a.sort() 
alice_sum=0
bob_sum=0
if len(a)%2==0:
  for i in range(0,n,2):
    bob_sum+=a[i]
  for l in range(1,n,2):
    alice_sum+=a[l]
else:
  for i in range(0,n,2):
    alice_sum+=a[i]
  for k in range(1,n,2):
    bob_sum+=a[k]
    
print(alice_sum-bob_sum)
Buggy python submission (verdict: Runtime Error):
from math import sqrt
a,b=map(int,input().split())
A={10**len(str(b))}*a
sq=A+b
if sqrt(sq)==int(sqrt(sq)):
  print('Yes')
else:
  print('No')

  


Fixed submission:
from math import sqrt
a,b=map(int,input().split())
B=len(str(b))
A=(10**B)*a
sq=A+b
if sqrt(sq)==int(sqrt(sq)):
  print('Yes')
else:
  print('No')
Buggy python submission (verdict: Runtime Error):
n,y=map(int,input().split())
if y>10000*n:
  print('-1 -1 -1')
else:
  for p in range(n+1):
    for q in range(n-p+1):
      if 10000*p+5000*q+1000*(n-p-q)==y:
        print(p,q,r)
        exit()
  print('-1 -1 -1')
        

Fixed submission:
n,y=map(int,input().split())
if y>10000*n:
  print('-1 -1 -1')
else:
  for p in range(n+1):
    for q in range(n-p+1):
      if 10000*p+5000*q+1000*(n-p-q)==y:
        print(p,q,n-p-q)
        exit()
  print('-1 -1 -1')