qyliang/CodeNanoFix huggingface dataset:
Buggy code:
N, K = map(int, input().split())
A = list(map(int, input().split()))
A = [i-1 for i in A]

check = [0]*N
i = 0
c = 0
check = []
Flag = False
while c<=K:
    if i in check:
        flag = True
        break
    else:
        check.append(i)
        i = A[i]

X = check[check.index(i):]
print(1+X[(K-c)%len(X)] if flag==True else print(A[i]+1))

Fixed code:
N, K = map(int, input().split())
A = list(map(int, input().split()))
A = [i-1 for i in A]

check = [0]*N
i = 0
c = 1
check = []
visited = [0]*N
flag = False
while c<=K:
    if visited[i] == 1:
        flag = True
        break
    else:
        check.append(i)
        visited[i] = 1
        i = A[i]
        c += 1
if flag==True:
    X = check[check.index(i):]
    print(1+X[(K-check.index(i))%len(X)])  
else: 
    print(i+1)
Buggy code:
# D

N, K = list(map(int, input().split()))
As = list(map(int, input().split()))

def compute(city, K):
    for i in range(K):
        # print('\t', city)
        city = As[city-1]
    print(city)

cities_visited = [False] * N
i = 0
city = 1
city_visited_time = {}

while not cities_visited[city - 1]:
    # print(city)
    cities_visited[city - 1] = True
    city_visited_time[city-1] = i
    city = As[city-1]
    i += 1

loop_start = city_visited_time[city-1]
loop_end = i


div = (K - loop_start) // (loop_end - loop_start)
if K - loop_start - div * (loop_end - loop_start) <= 0:
    compute(1, K)
compute(city, K - loop_start - div * (loop_end - loop_start))

Fixed code:
# D

N, K = list(map(int, input().split()))
As = list(map(int, input().split()))

def compute(city, K):
    for i in range(K):
        # print('\t', city)
        city = As[city-1]
    print(city)

cities_visited = [False] * N
i = 0
city = 1
city_visited_time = {}

while not cities_visited[city - 1]:
    # print(city)
    cities_visited[city - 1] = True
    city_visited_time[city-1] = i
    city = As[city-1]
    i += 1

loop_start = city_visited_time[city-1]
loop_end = i


div = (K - loop_start) // (loop_end - loop_start)
if K - loop_start < 0 or div == 0:
    compute(1, K)
else:
    compute(city, K - loop_start - div * (loop_end - loop_start))
Buggy code:
n,k=map(int,input().split())

a=list(map(int,input().split()))

l=[1]
di={}
di[1]=1

for i in a:
    b=a[l[-1]-1]
    if b in di:
        x=b
        break
    l.append(b)
    di[b]=1
t1=0
for j in l:
    if j==x:
        break
    else:
        aa+=1

t2=len(l)-t1
if k<=t1:
    print(l[k])

else:
    aa=(k-t1)%t2
    print(l[t1+aa])


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

a=list(map(int,input().split()))

l=[1]
di={}
di[1]=1

for i in a:
    b=a[l[-1]-1]
    if b in di:
        x=b
        break
    l.append(b)
    di[b]=1
aa=0
for j in l:
    if j==x:
        break
    else:
        aa+=1

bb=len(l)-aa
if k<=aa:
    print(l[k])

else:
    cc=(k-aa)%bb
    print(l[aa+cc])
Buggy code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
i=0
res=[1,a[0]]

end=0
ans=0

while True:
    i=a[i]-1
    t=a[i]
    print(t)
    if t not in res:
        res.append(t)
    else:
        end=i
        break
l=len(res)
s=res.index(a[end])
r=l-s
if k<l:
    print(res[k])
else:
    k-=s
    ans=k%r + s
    print(res[ans])

Fixed code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
i=0

res=[1,a[0]]
d=set(res)

end=0
ans=0

while True:
    if i>n-1:
      break
    
    i=a[i]-1
    t=a[i]
    if t not in d:
        res.append(t)
        d.add(t)
    else:
        end=i
        break
l=len(res)
s=res.index(a[end])
r=l-s
if k<l:
    print(res[k])
else:
    k-=s
    ans=k%r + s
    print(res[ans])
Buggy code:
n, k  = map(int, input().split())
an = list(map(int, input().split()))
bn = [-1]*(n+1)

now=1
bn[1]=0
for i in range(1, k+1):
    print(bn)
    now = an[now-1]
    if bn[now] >0:
        rp =i-bn[now]
        p= (k-i)%rp
        for j in range(p):
            now = an[now-1]
        print(now)
        exit(0)
    bn[now]=i
print(now)

Fixed code:
n, k  = map(int, input().split())
an = list(map(int, input().split()))
bn = [-1]*(n+1)

now=1
bn[1]=0
for i in range(1, k+1):
 #   print(bn)
    now = an[now-1]
    if bn[now] >0:
        rp =i-bn[now]
        p= (k-i)%rp
        for j in range(p):
            now = an[now-1]
        print(now)
        exit(0)
    bn[now]=i
print(now)
Buggy code:
n,k = map(int, input().split())
a = list(map(int, input().strip().split()))
#print(a)
visited = [-1] * (n+1)


now = 0
visited[0] = 0
pre_roop = 0
pos = 0
i = 1
while i < k:
    next = a[now-1]
    #print('roop:',i,now+1,next+1)
    if visited[next] >= 0:
        r = i-visited[next]
        pre_roop = visited[next]
        pos = next
        #print(i,r,pre_roop,next)
        #print(visited)
        break
    else:
        visited[next] = i
        now = next
        #print(i,visited)
        i += 1
l = (k - pre_roop) % r
#print(l)
i = 0
p = pos
while i < l:
    p = a[p-1]
    i +=1

print(p+1)



Fixed code:
n,k = map(int, input().split())
a = list(map(int, input().strip().split()))

for i in range(len(a)):
    a[i] -= 1

visited = [-1] * n
now = 0
visited[0] = 0
pre_roop = 0
pos = 0
i = 1
r = 1
while i <= k:
    next = a[now]
    #print('roop:',i,now+1,next+1)
    if visited[next] >= 0:
        r = i-visited[next]
        pre_roop = visited[next]
        pos = next
        #print(i,r,pre_roop,next)
        #print(visited)
        break
    else:
        visited[next] = i
        now = next
        #print(i,visited)
        i += 1

if i > k:
    print(now + 1)
else:
    l = (k - pre_roop) % r
    #print(l)
    i = 0
    p = pos
    while i < l:
        p = a[p]
        i +=1

    print(p+1)
Buggy code:
n,k = list(map(int, input().split()))
a = list(map(int, input().split()))
idx=1
li=[]
idx_li=[1]
flag=False
for i in range(k):
    idx=a[idx-1]
    if idx in idx_li:
        flag=True
        break
    idx_li.append(idx)
if flag:
    #non_loop=idx_li[:idx_li.index(idx)]
    loop = idx_li[idx_li.index(idx):]
    
    size=len(loop)
    print(loop[(k-(len(idx_li)-len(non_loop)))%size])
else:
    print(idx)

Fixed code:
n,k = list(map(int, input().split()))
a = list(map(int, input().split()))
idx=1
idx_li=[]
ord_=[-1]*n
flag=False
for i in range(k):
    idx_li.append(idx)
    ord_[idx-1]=1
    idx=a[idx-1]
    if ord_[idx-1]==1:
        flag=True
        break
if flag:
    #non_loop=idx_li[:idx_li.index(idx)]
    loop = idx_li[idx_li.index(idx):]
    
    size=len(loop)
    print(loop[(k-(len(idx_li)-len(loop)))%size])
else:
    print(idx)
Buggy code:
n,k=map(int,input().split())
a=list(map(lambda x:int(x)-1,input().split()))
lst=[0]
now=0
memo=0
town=[0]*n
town[0]=1
b=0 
for i in range(k):
  now=a[now]
  if town[now]==1:
    memo=now 
    b=1
    break
  lst.append(now)
  town[now]=1
if b==1:
  i=lst.index(now)　
  l=len(lst)
  if memo!=0:
    lst=lst[i:]
    l-=len(lst)
    print(lst[(k-l)%len(lst)]+1)
  else:
    print(lst[k%l]+1)
else:
  print(now)


Fixed code:
n,k=map(int,input().split())
a=list(map(lambda x:int(x)-1,input().split()))
lst=[0]
now=0
memo=0
town=[0]*n
town[0]=1
b=0
for i in range(k):
	now=a[now]
	if town[now]==1:
		memo=now
		b=1
		break
	lst.append(now)
	town[now]=1
if b==1:
	i=lst.index(memo)
	l=len(lst)
	if memo!=0:
		lst=lst[i:]
		l-=len(lst)
		print(lst[(k-l)%len(lst)]+1)
	else:
		print(lst[k%l]+1)
else:
	print(now+1)
Buggy code:
n,k=map(int,input().split())


a = list(map(int, input().split()))

ar=[-1 for i in range(n+1)]
p=1
h=[]
go=0


for i in range(1,k+1):
    
    
    
    

    ar[p]=i
    p=a[p-1]
    
    if ar[p]>0:
        j=ar[p]
        amari=(k-i-1)%(i-j)
        p=h[j+amari]
        go=1
        break

if go==1:
    p=ar.index(j+amari)
    p=a[p-1]


print(p)


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


a = list(map(int, input().split()))

ar=[-1 for i in range(n+1)]
p=1

go=0


for i in range(1,k+1):
    
    
    
    

    ar[p]=i-1
    p=a[p-1]
    
    if ar[p]>0:
        j=ar[p]
        amari=(k-i)%(i-j)
        
        go=1
        break

if go==1:
    p=ar.index(j+amari)
    
    


print(p)
Buggy code:
n,k = list(map(int,input().split()))
A = list(map(int,input().split()))

if k == 1:exit(print(A[0]))
t = 0
dp = [-1] * n
dp[0] = 0
for i in range(1,k+1):
  t = A[t]-1
  if dp[t] != -1:break
  dp[t] = i
  
l = i - dp[t]
K = (k-dp[t])%l + dp[t]
print(dp)
for i in range(n):
  if dp[i] == K:exit(print(i+1))

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

if k == 1:exit(print(A[0]))
t = 0
dp = [-1] * n
dp[0] = 0
flg = 0
for i in range(1,k+1):
  t = A[t]-1
  if dp[t] != -1:
    flg = 1
    break
  dp[t] = i
if flg == 0:
  exit(print(t+1))
elif k == 2:
  exit(print(t+1))

l = i - dp[t]
K = (k-dp[t])%l + dp[t]

for i in range(n):
  if dp[i] == K:exit(print(i+1))
Buggy code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
town=[0]*n
info=[1]
now=1
while town[now-1]==0:
    town[now-1]+=1
    now=a[now-1]
    info.append(now)
loop_list=list(info[info.index(now):-1])
loop_len=len(loop_list)
before_loop_list=list(info[:info.index(now)])
print(town)
print(info)
if k<len(before_loop_list):
    print(before_loop_list[k])
else:
    print(loop_list[((k-len(before_loop_list))%loop_len)])

Fixed code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
town=[0]*n
info=[1]
now=1
while town[now-1]==0:
    town[now-1]+=1
    now=a[now-1]
    info.append(now)
loop_list=list(info[info.index(now):-1])
loop_len=len(loop_list)
before_loop_list=list(info[:info.index(now)])
#print(town)
#print(info)
if k<len(before_loop_list):
    print(before_loop_list[k])
else:
    print(loop_list[((k-len(before_loop_list))%loop_len)])
Buggy code:
N,K=map(int,input().split())
P=list(map(int,input().split()))

A={k+1:P[k] for k in range(N)}


U=list()
S=set()
x=1
k=0

while (x not in S) and (k<=K):
    U.append(x)
    S.add(x)
    
    x=A[x]
    k+=1

if k>K:
    print(U[-1])
else:
    d=U.index(x)
    V=U[d:]
    print(V[(K-d)%len(V)])
    print(U,V)


Fixed code:
N,K=map(int,input().split())
P=list(map(int,input().split()))

A={k+1:P[k] for k in range(N)}


U=list()
S=set()
x=1
k=0

while (x not in S) and (k<=K):
    U.append(x)
    S.add(x)
    
    x=A[x]
    k+=1

if k>K:
    print(U[-1])
else:
    d=U.index(x)
    V=U[d:]
    print(V[(K-d)%len(V)])
Buggy code:
from sys import stdin
import sys
import math
from functools import reduce
import functools
import itertools
from collections import deque

n,k = [int(x) for x in stdin.readline().rstrip().split()]
a = [0] + [int(x) for x in stdin.readline().rstrip().split()]

m = 0
b = [1]

c = 1
for i in range(n):
    c = a[c]
    if c not in b:
        b.append(c)
        if i == k-1: print(c)
        sys.exit()
    else:
        break

idx = b.index(c)
bn = len(b[idx:])
sn = len(b[:idx])

# print(b,idx,sn,bn)
kk = (k-sn) % bn
print(b[idx+kk])

Fixed code:
from sys import stdin
import sys
import math
from functools import reduce
import functools
import itertools
from collections import deque

n,k = [int(x) for x in stdin.readline().rstrip().split()]
a = [0] + [int(x) for x in stdin.readline().rstrip().split()]

m = 0
b = [1]
visited = [-1 for i in range(n+1)]

c = 1
visited[1] = 1
for i in range(n):
    c = a[c]
    if visited[c] != 1:
        b.append(c)
        visited[c] = 1
        if i == k-1:
            print(c)
            sys.exit()
    else:
        break

idx = b.index(c)
bn = len(b[idx:])
sn = len(b[:idx])

# print(b,idx,sn,bn)
kk = (k-sn) % bn
print(b[idx+kk])
Buggy code:
a, b = list(map(int, input().split()))
c = list(map(int, input().split()))
itta2 = set([])
mati = 1
i = 0
itta = []
t0 = time.time()
while True:
    if mati in itta2:
        saisyo = mati
        break
    else:
        itta2.add(mati)
        itta.append(mati)
        mati = c[mati-1]
        i += 1
print(time.time()-t0)
risuto2 = set([])
risuto = []
t0 = time.time()

while True:
    if mati in risuto2:
        break
    else:
        risuto2.add(mati)
        risuto.append(mati)
        mati = c[mati-1]
print(time.time()-t0)
if b <= i-1:
    print(itta[b])
else:
    print(risuto[(b-i) % len(risuto)])

Fixed code:
a, b = list(map(int, input().split()))
c = list(map(int, input().split()))
itta2 = set([])
mati = 1
i = 0
itta = []
while True:
    if mati in itta2:
        saisyo = mati
        break
    else:
        itta2.add(mati)
        itta.append(mati)
        mati = c[mati-1]
        i += 1
risuto2 = set([])
risuto = []

while True:
    if mati in risuto2:
        break
    else:
        risuto2.add(mati)
        risuto.append(mati)
        mati = c[mati-1]
if b <= i-1:
    print(itta[b])
else:
    print(risuto[(b-i) % len(risuto)])
Buggy code:
N,K=map(int,input().split())
alist=[0]+list(map(int,input().split()))
#print(alist)

tlist=[]
pos=1
pos_set=set()
while True:
  tlist.append(pos)
  if pos in pos_set:
    break
  pos_set.add(pos)
  pos=alist[pos]
  
dup_pos2=len(tlist)-1
dup_pos1=-1
for i in range(len(tlist)):
  if tlist[i]==tlist[-1]:
    dup_pos1=i
    break
    
print(tlist)
cycle=dup_pos2-dup_pos1
#print(dup_pos1,dup_pos2,cycle)
if K<len(tlist):
  print(tlist[K])
else:
  print(tlist[(K-dup_pos1)%cycle+dup_pos1])

Fixed code:
N,K=map(int,input().split())
alist=[0]+list(map(int,input().split()))
#print(alist)

tlist=[]
pos=1
pos_set=set()
while True:
  tlist.append(pos)
  if pos in pos_set:
    break
  pos_set.add(pos)
  pos=alist[pos]
  
dup_pos2=len(tlist)-1
dup_pos1=-1
for i in range(len(tlist)):
  if tlist[i]==tlist[-1]:
    dup_pos1=i
    break
    
#print(tlist)
cycle=dup_pos2-dup_pos1
#print(dup_pos1,dup_pos2,cycle)
if K<len(tlist):
  print(tlist[K])
else:
  print(tlist[(K-dup_pos1)%cycle+dup_pos1])
Buggy code:
n,k=map(int,input().split())
A=tuple(map(int,input().split()))
s=1
state=[s]
count={}
for i in range(k+1):
    s=A[s-1]
    if s in count:
        start=len(state)
        end=i=1
        print(state[start+(k-start)%(end-start)])
        break
    else:
        count[state[i]]=i
        state.append[s]
else:
    print(s)


Fixed code:
n,k=map(int,input().split())
A=tuple(map(int,input().split()))
s=1
state=[s]
count={}
for i in range(1,k+1):
    s=A[s-1]
    if s in count:
        start=state.index(s)
        end=len(state)
        print(state[start+(k-start)%(end-start)])
        break
    else:
        count[s]=i
        state.append(s)
        continue
else:
    print(s)
Buggy code:
N,K = map(int, input().split(' '))

cache={}
log=[]
A = list(map(lambda x:int(x)-1, input().split(' ')))

now=0

while(True):
  log.append(now)
  cache[now]=1
  now=A[now]
  if(cache.get(now)):break

loop_start=log.index(now)
loop_end=len(log)
loop=loop_end-loop_start
#print(loop_end-loop_start,loop_start)
print(loop_start,loop_end,log)
if len(log) >= loop:
  if loop_end>K:
    print(now)
  else:
    print(log[K%loop]+1)
else:
  print(log[K%loop+loop]+1)

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

cache={}
log=[]
A = list(map(lambda x:int(x)-1, input().split(' ')))

now=0

while(True):
  log.append(now)
  cache[now]=1
  now=A[now]
  if(cache.get(now)):break

loop_start=log.index(now)
loop_end=len(log)
loop=loop_end-loop_start

if K<len(log):
  print(log[K]+1)
else:
  print(log[(K-loop_start)%loop+loop_start]+1)
Buggy code:
n,k=list(map(int,input().split()))
a=[0]+ list(map(int,input().split()))

visited=[1]

for i in range(n):
  next=a[visited[-1]]
  visited.append(next)
  
loop_end=n
loop_start=n-1
while visited[loop_start]!=visited[loop_end]:
  loop_start-=1
period=loop_end-loop_start
#print(visited) 
#print("p:",period)
#print("k%period:",k%period)

if k<n+1:
  print(visited[k])
  exit()
else:
  print(visited[n-(k-n)%period+1])

Fixed code:
n,k=list(map(int,input().split()))
a=[0]+ list(map(int,input().split()))

visited=[1]

for i in range(n):
  next=a[visited[-1]]
  visited.append(next)
  
loop_end=n
loop_start=n-1
while visited[loop_start]!=visited[loop_end]:
  loop_start-=1
period=loop_end-loop_start
#print(visited) 
#print("p:",period)
#print("(k-n)%period:",(k-n)%period)

if k<n+1:
  print(visited[k])
  exit()
else:
  print(visited[n-period+(k-n)%period])
Buggy code:
n,k=map(int,input().split())
p=list(map(int,input().split()))
a=[0]+p
flag=0
bef=1
town=[1]
town_set=set(town)
cnt=0
while flag==0 and cnt<k:
    if not a[bef] in town_set:
        town.append(a[bef])
        town_set.add(a[bef])
        bef=a[bef]
    else:
        flag=1
        memo=a[bef]
        print(cnt)
    cnt+=1
if flag==0:
    print(bef)
    exit()
for j in range(len(town)):
    if town[j]==memo:
        num=j
x=len(town)-num
y=(k-num)%x
print(town[num+y])


Fixed code:
n,k=map(int,input().split())
p=list(map(int,input().split()))
a=[0]+p
flag=0
bef=1
town=[1]
town_set=set(town)
cnt=0
while flag==0 and cnt<k:
    if not a[bef] in town_set:
        town.append(a[bef])
        town_set.add(a[bef])
        bef=a[bef]
    else:
        flag=1
        memo=a[bef]
        break
    cnt+=1
if cnt==k:
    print(bef)
    exit()
for j in range(len(town)):
    if town[j]==memo:
        num=j
        break
x=len(town)-num
y=(k-num)%x
print(town[num+y])
Buggy code:
import sys
def input(): return sys.stdin.readline().strip()


def main():
    N, K = map(int, input().split())
    A = [0] + list(map(int, input().split()))

    pos = A[1]
    visited = {1}
    while pos not in visited:
        visited.add(pos)
        pos = A[pos]
    
    start = pos
    loop = 1
    pos = A[pos]
    while pos != start:
        pos = A[pos]
        loop += 1
    
    dist = 0
    pos = 1
    while pos != start:
        pos = A[pos]
        dist += 1

    print("dist={}, loop={}".format(dist, loop))
    
    if dist < K:
        K -= dist
        K %= loop
        pos = start
        for _ in range(K): pos = A[pos]
        print(pos)
    else:
        pos = 1
        for _ in range(K): pos = A[pos]
        print(pos)


if __name__ == "__main__":
    main()


Fixed code:
import sys
def input(): return sys.stdin.readline().strip()


def main():
    N, K = map(int, input().split())
    A = [0] + list(map(int, input().split()))

    pos = A[1]
    visited = {1}
    while pos not in visited:
        visited.add(pos)
        pos = A[pos]
    
    start = pos
    loop = 1
    pos = A[pos]
    while pos != start:
        pos = A[pos]
        loop += 1
    
    dist = 0
    pos = 1
    while pos != start:
        pos = A[pos]
        dist += 1

    #print("dist={}, loop={}".format(dist, loop))
    
    if dist < K:
        K -= dist
        K %= loop
        pos = start
        for _ in range(K): pos = A[pos]
        print(pos)
    else:
        pos = 1
        for _ in range(K): pos = A[pos]
        print(pos)


if __name__ == "__main__":
    main()
Buggy code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
adj=[1]*n
b=[1]
now=0
while adj[now]:
  adj[now]=0
  now=a[now]-1
  c.append(now+1)
loop_start=c.index(c[-1])
loop=c[loop_start:-1]
p=len(loop)
if k<loop_start:
  print(c[k])
else:
  k-=loop_start
  k%=p
  print(loop[k])

Fixed code:
n,k=map(int,input().split())
a=list(map(int,input().split()))
adj=[1]*n
b=[1]
now=0
while adj[now]:
  adj[now]=0
  now=a[now]-1
  b.append(now+1)
loop_start=b.index(b[-1])
loop=b[loop_start:-1]
p=len(loop)
if k<loop_start:
  print(b[k])
else:
  k-=loop_start
  k%=p
  print(loop[k])
Buggy code:
from numba import njit
import numpy as np


def main(N, K, A):
    d = np.zeros(N,np.int32)
    d=d-1
    p = 0
    for i in range(K):
        if d[p-1] == 0:
            d[p-1] = i
            p = A[p-1]
        else:
            p = A[p-1]
            loop = i-d[p-1]
            nokori = (K-d[p-1]) % loop
            for _ in range(nokori):
                p = A[p-1]
            return p
    return p


N, K = map(int, input().split())
A = list(map(int, input().split()))
ans=main(N, K, A)
print(ans)


Fixed code:
from numba import njit
import numpy as np


def main(N, K, A):
    d = np.zeros(N, np.int32)
    d = d-1
    p = 1
    for i in range(K):
        if d[p-1] == -1:
            d[p-1] = i
            p = A[p-1]
        else:
            p = A[p-1]
            loop = i-d[p-1]+1
            nokori = (K-d[p-1]) % loop
            for _ in range(nokori):
                p = A[p-1]
            return p
    return p


N, K = map(int, input().split())
A = list(map(int, input().split()))
ans = main(N, K, A)
print(ans)
Buggy code:
n, k = map(int,input().split())
a_l = list(map(int,input().split()))

town = 1
count = 0
town_visited = set()
while count < k:
    town_visited.add(town)
    town = a_l[town-1]
    count += 1
    if town in town_visited:
        break

k -= count
if k = 0:
    print(town)
    exit()
count = 0
town_visited = set()
while count < k:
    town_visited.add(town)
    town = a_l[town-1]
    count += 1
    if town in town_visited:
        break

remain = k%count
count = 0
while count < remain:
    town = a_l[town-1]
    count += 1
   
print(town)

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

town = 1
count = 0
town_visited = set()
while count < k:
    town_visited.add(town)
    town = a_l[town-1]
    count += 1
    if town in town_visited:
        break

k -= count
if k == 0:
    print(town)
    exit()
count = 0
town_visited = set()
while count < k:
    town_visited.add(town)
    town = a_l[town-1]
    count += 1
    if town in town_visited:
        break

remain = k%count
count = 0
while count < remain:
    town = a_l[town-1]
    count += 1
   
print(town)
Buggy code:
from collections import Counter
N, K = map(int,input().split())
A = list(map(int,input().split()))
i = k = 0
B = [1]
while k <= N or k <= K:
    i = A[i] - 1
    B.append(i + 1)
    k += 1
S = Counter(B)
idx = S.most_common(1)[0][0]
i = k = cnt = 0
while k < 10 ** 6:
    if B[k] == idx and cnt == 1:
        k_s = k
        break
    elif B[k] == idx:
        k_f = k
    k += 1
if k_s:
    k_max = K % (k_s - k_f)
else:
    k_max = K
i = k = 0
while k < k_max:
    i = A[i] - 1
    k += 1
print(i + 1)   

Fixed code:
from collections import Counter
N, K = map(int,input().split())
A = list(map(int,input().split()))
i = k = 0
B = [1]
while k <= 10 ** 6:
    i = A[i] - 1
    B.append(i + 1)
    k += 1
S = Counter(B)
idx = S.most_common(1)[0][0]
i = k = cnt = 0
k_s = None
while k < 10 ** 6:
    if B[k] == idx and cnt == 1:
        k_s = k
        break
    elif B[k] == idx:
        k_f = k
        cnt += 1
    k += 1
if k_s and k_s < K:
    k_max = (K - B.index(idx)) % (k_s - k_f) + B.index(idx)
else:
    k_max = K
i = k = 0
while k < k_max:
    i = A[i] - 1
    k += 1
print(i + 1)
Buggy code:
import sys
import itertools
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
 
N, K = map(int, readline().split())
A = list(map(lambda x: x - 1, map(int, readline().split())))
visited = [False for i in range(N)]

cur = 0
cycle = []
start = 0
while True:
    if visited[cur]:
        start = cur + 1
        break

    visited[cur] = True
    cycle.append(cur + 1)
    cur = A[cur]

print(cycle)
cycle_start_idx = 0
for i in range(len(cycle)):
    if cycle[i] == start:
        cycle_start_idx = i
        break

if K <= cycle_start_idx:
    print(cycle[K])
    exit()


cycle_len = len(cycle) - cycle_start_idx
idx = (K - cycle_start_idx) % cycle_len
print(cycle[idx + cycle_start_idx])

Fixed code:
import sys
import itertools
import numpy as np

read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines
 
N, K = map(int, readline().split())
A = list(map(lambda x: x - 1, map(int, readline().split())))
visited = [False for i in range(N)]

cur = 0
cycle = []
start = 0
while True:
    if visited[cur]:
        start = cur + 1
        break

    visited[cur] = True
    cycle.append(cur + 1)
    cur = A[cur]

# print(cycle)
cycle_start_idx = 0
for i in range(len(cycle)):
    if cycle[i] == start:
        cycle_start_idx = i
        break

if K <= cycle_start_idx:
    print(cycle[K])
    exit()


cycle_len = len(cycle) - cycle_start_idx
idx = (K - cycle_start_idx) % cycle_len
print(cycle[idx + cycle_start_idx])