qyliang/CodeNanoFix huggingface dataset:
Buggy code:
from itertools import combinations

N, M, X = map(int, input().split())
skill = [0] * M
N_list = []
C_sum = 0
all_list = [0] * (M+1)

res_list = 0
for i in range(N):
  list_ = list(map(int, input().split()))
  N_list.append(list_)
  all_list = [all_list[i]+list_[i] for i in range(M+1)]
if all(all_list[j] < X for j in range(1, M+1)):
  print(-1)
  exit()
result = []  
for i in range(1, N+1):
  ref = list(combinations(N_list, i))
  for j in range(len(ref)):
    sums = [0] * (M+1)
    for k in range(i):
      sums = [sums[l]+ref[j][k][l] for l in range(M+1)]
    result.append(sums)
kekka = []
for i in range(len(result)):
  if all(result[i][j]>=X for j in range(1, M+1)):
    kekka.append(result[i][0])
print(min(kekka))

Fixed code:
from itertools import combinations

N, M, X = map(int, input().split())
skill = [0] * M
N_list = []
C_sum = 0
all_list = [0] * (M+1)

res_list = 0
for i in range(N):
  list_ = list(map(int, input().split()))
  N_list.append(list_)
  all_list = [all_list[i]+list_[i] for i in range(M+1)]

result = []  
for i in range(1, N+1):
  ref = list(combinations(N_list, i))
  for j in range(len(ref)):
    sums = [0] * (M+1)
    for k in range(i):
      sums = [sums[l]+ref[j][k][l] for l in range(M+1)]
    result.append(sums)
kekka = []
for i in range(len(result)):
  if all(result[i][j]>=X for j in range(1, M+1)):
    kekka.append(result[i][0])
if kekka != []:
  print(min(kekka))
else:
  print(-1)
Buggy code:
def check(idxs_):
    rikaido = [0 for i in range(m)]
    cost_ = 0
    for i in idxs_:
        for j in range(m):
            rikaido[j] += a[i][j]
        cost_ += c[i]
    for i in range(m):
        if rikaido[i] < x:
            cost_ = 9999999
    return cost_


n, m, x = map(int, input().split())
c = []
a = []
for i in range(n):
    _ = list(map(int, input().split()))
    c.append(_[0])
    a.append(_[1:])

mini = 9999999

for i in range(2 ** n):
    _ = []
    for j in range(n):
        if ((i >> j) & 1):
            _.append(j)
    cost = check(_)
    if cost < mini:
        mini = cost
    # print(mini)

if mini == 99999999:
    mini = -1

print(mini)


Fixed code:
def check(idxs_):
    rikaido = [0 for i in range(m)]
    cost_ = 0
    for i in idxs_:
        for j in range(m):
            rikaido[j] += a[i][j]
        cost_ += c[i]
    for i in range(m):
        if rikaido[i] < x:
            cost_ = 9999999
    return cost_


n, m, x = map(int, input().split())
c = []
a = []
for i in range(n):
    _ = list(map(int, input().split()))
    c.append(_[0])
    a.append(_[1:])

mini = 9999999

for i in range(2 ** n):
    _ = []
    for j in range(n):
        if ((i >> j) & 1):
            _.append(j)
    cost = check(_)
    if cost < mini:
        mini = cost
    # print(mini)

if mini == 9999999:
    mini = -1

print(mini)
Buggy code:
n, m, x = map(int, input().split())

A = [list(map(int, input().split())) for j in range(n)]
ans = 10 ** 7
for i in range(1 << n):
    s = [0] * (m + 1)
    for j in range(n):
        if i >> j & 1:
            for k in range(m+1):
                s[k] += A[j][k]
    if min(s[1:]) >= x:
        ans = min(ans, s[0])
print(-1) if ans == 10 ** 6 else print(ans)

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

A = [list(map(int, input().split())) for j in range(n)]
ans = 10 ** 7
for i in range(1 << n):
    s = [0] * (m + 1)
    for j in range(n):
        if i >> j & 1:
            for k in range(m+1):
                s[k] += A[j][k]
    if min(s[1:]) >= x:
        ans = min(ans, s[0])
print(-1) if ans == 10 ** 7 else print(ans)
Buggy code:
import itertools
import numpy as np

N,M,X = map(int, input().split())
lista = [list(map(int,input().split())) for i in range(N)]

lista = np.array(lista)
judge = [X]*M
cost = 1200001
data = [a for a in range(1,N+1)] # [1,2,3,...,N]

for i in range(1,N+1):
    j = list(itertools.combinations(data, i))
    for k in j:
        result = np.array([0]*(M+1))
        for l in k:
            result = result + lista[l-1]
        if all(result[1:]>=judge):
            if reslut[0]<cost:
                cost = result[0]
                m = k
c = 0

try:
    for i in m:
        c +=lista[i-1][0]
    
    print(c)
except:

Fixed code:
import itertools
import numpy as np

N,M,X = map(int, input().split())
lista = [list(map(int,input().split())) for i in range(N)]

lista = np.array(lista)
judge = [X]*M
cost = 120000000000
data = [a for a in range(1,N+1)] # [1,2,3,...,N]

for i in range(1,N+1):
    j = list(itertools.combinations(data, i))
    for k in j:
        result = np.array([0]*(M+1))
        for l in k:
            result = result + lista[l-1]
        if all(result[1:]>=judge):
            if result[0]<cost:
                cost = result[0]
                m = k
c = 0

try:
    for i in m:
        c +=lista[i-1][0]
    
    print(c)
except:
    print(-1)
Buggy code:
n,m,x=map(int,input().split())
c=[]
a=[]
for i in range(m):
	C,*A=map(int,input().split())
	c.append(C)
	a.append(A)

ans=[]
for i in range(2**n):
	A=[0]*m
	C=0
	lst=list(map(int,format(i,'b').zfill(n)))
	for j in range(m):
		if lst[j]==1:
			C+=c[j]
			for k in range(m):
				A[k]+=a[j][k]
	if all(elem>=x for elem in A):
		ans.append(C)
if len(ans):
	print(min(ans))
else:
	print(-1)

Fixed code:
n,m,x=map(int,input().split())
c=[]
a=[]
for i in range(n):
	C,*A=map(int,input().split())
	c.append(C)
	a.append(A)

ans=[]
for i in range(2**n):
	A=[0]*m
	C=0
	lst=list(map(int,format(i,'b').zfill(n)))
	for j in range(n):
		if lst[j]==1:
			C+=c[j]
			for k in range(m):
				A[k]+=a[j][k]
	if all(elem>=x for elem in A):
		ans.append(C)
if len(ans):
	print(min(ans))
else:
	print(-1)
Buggy code:
import itertools

N, M, X = [int(i) for i in input().split()]
CA = [] # (C, A)
A = []
for i in range(N):
    c, *a = [int(i) for i in input().split()]
    CA.append((c, a))

min_c = 12 * 10**5 + 1
for x in range(1, N+1):
    for ca in itertools.combinations(CA, x):
        tmp_a = [0 for _ in range(M)]
        tmp_c = 0
        for s in ca:
            tmp_c += s[0]
            tmp_a = [tmp_a[j]+s[1][j] for j in range(M)]
        print(tmp_a)
        if min(tmp_a) >= X:
            min_c = min(min_c, tmp_c)

if min_c == 12 * 10**5 + 1:
    print(-1)
else:
    print(min_c)


Fixed code:
import itertools

N, M, X = [int(i) for i in input().split()]
CA = [] # (C, A)
A = []
for i in range(N):
    c, *a = [int(i) for i in input().split()]
    CA.append((c, a))

min_c = 12 * 10**5 + 1
for x in range(1, N+1):
    for ca in itertools.combinations(CA, x):
        tmp_a = [0 for _ in range(M)]
        tmp_c = 0
        for s in ca:
            tmp_c += s[0]
            tmp_a = [tmp_a[j]+s[1][j] for j in range(M)]
        if min(tmp_a) >= X:
            min_c = min(min_c, tmp_c)

if min_c == 12 * 10**5 + 1:
    print(-1)
else:
    print(min_c)
Buggy code:
import numpy as np
n,m,x=map(int,input().split())
c=[]
A=[]
for _ in range(n):
    l = [int(i) for i in input().split()]
    c.append(l[0])
    A.append(l[1:])
c=np.array(c)
A=np.array(A)
ans = 20*10**5
bits =[]

for i in range(2 ** n):
    bag = []
    for j in range(n):
        if ((i >> j) & 1): 
            bag.append(j)
    ar = np.sum(A[bag],axis=0)
    if all(ar>=x):
        temp = np.sum(c[bag])
        ans = min(ans,temp)
print(ans)

Fixed code:
import numpy as np
n,m,x=map(int,input().split())
c=[]
A=[]
for _ in range(n):
    l = [int(i) for i in input().split()]
    c.append(l[0])
    A.append(l[1:])
c=np.array(c)
A=np.array(A)
ans = 20*10**9
bits =[]

for i in range(2 ** n):
    bag = []
    for j in range(n):
        if ((i >> j) & 1): 
            bag.append(j)
    ar = np.sum(A[bag],axis=0)
    if all(ar>=x):
        temp = np.sum(c[bag])
        ans = min(ans,temp)
if ans == 20*10**9:
    print(-1)
else:
    print(ans)
Buggy code:
n,m,x = map(int, input().split())
costs = [list(map(int, input().split())) for _ in range(n)]

'''
n,m,x = [int(i) for i in input().split()]
costs =[]

for i in range(n):
    a = [int(i) for i in input().split()]
    costs.append(a)
'''


INF = 1000000000000000000000000000
ans = INF

for i in range(1<<n):  #n bits all searches
    # 1<<n == 2**n
    c = 0
    sums = [0]*m
    for j in range(n):
        if i>>j & 1: #i>>j %2 == 1  is also fine.
            #apply this candidate. 
            c += costs[j][0]
            for k in range(m):
                sums[k] += costs[j][k+1]
    
'''
    cost = 0
    c = 0
    sums = [0] * m
    use_index=[]
    for j in range(n):
        if i%2==1:
            use_index.append(j)
        i >>= 1
    
    for v in use_index:
        c += costs[v][0]        
        for j in range(m):
            sums[j] += costs[v][j+1]
'''

    if min(sums) >= x:
        ans = min(ans, c)

'''            
    judge=True
    for j in range(m):
        if sums[j]<x:
            judge=False
            break
    
    if judge:
        ans = min(ans, c)
'''
ans = -1 if ans==INF 
print(ans)



Fixed code:
n,m,x = map(int, input().split())
costs = [list(map(int, input().split())) for _ in range(n)]

'''
n,m,x = [int(i) for i in input().split()]
costs =[]

for i in range(n):
    a = [int(i) for i in input().split()]
    costs.append(a)
'''


INF = 1000000000000000000000000000
ans = INF

for i in range(1<<n):  #n bits all searches
    # 1<<n == 2**n
    c = 0
    sums = [0]*m
    for j in range(n):
        if i>>j & 1: #i>>j %2 == 1  is also fine.
            #apply this candidate. 
            c += costs[j][0]
            for k in range(m):
                sums[k] += costs[j][k+1]    
    '''
    cost = 0
    c = 0
    sums = [0] * m
    use_index=[]
    for j in range(n):
        if i%2==1:
            use_index.append(j)
        i >>= 1
    
    for v in use_index:
        c += costs[v][0]        
        for j in range(m):
            sums[j] += costs[v][j+1]
    '''
    
    if min(sums) >= x:
        ans = min(ans, c)
'''            
    judge=True
    for j in range(m):
        if sums[j]<x:
            judge=False
            break
    
    if judge:
        ans = min(ans, c)
'''
if ans==INF:
    print(-1)
else:
    print(ans)
Buggy code:
import numpy as np
import itertools
n,m,x=map(int,input().split())
a=[]
b=[0]*m
skill=np.array([b])
ans=[]
money=0
for _ in range(n):
    a.append(list(map(int,input().split())))
for i in range(1,n+1):
    for j in itertools.combinations_with_replacement(range(1,n+1),i):
        for k in range(len(j)):
            money+=a[j[k]-1][0]
            skill+=np.array([a[j[k]-1][1:m+1]])
        if all([i>=x for i in skill[0]]):
            ans.append(money)
        money=0
        skill=np.array([b])
print(min(ans))

Fixed code:
import numpy as np
import itertools
n,m,x=map(int,input().split())
a=[]
b=[0]*m
skill=np.array([b])
ans=[]
money=0
for _ in range(n):
    a.append(list(map(int,input().split())))
for i in range(1,n+1):
    for j in itertools.combinations(range(1,n+1),i):
        for k in range(len(j)):
            money+=a[j[k]-1][0]
            skill+=np.array([a[j[k]-1][1:m+1]])
        if all([i>=x for i in skill[0]]):
            ans.append(money)
        money=0
        skill=np.array([b])
if len(ans)==0:
    print(-1)
else:
    print(min(ans))
Buggy code:
ef can_reach_the_goal(u, x):
    return min(u) >= x

n, m, x = map(int, input().split())

c = []
a = []
for i in range(n):
    ca = [int(row) for row in input().split()]
    c.append(ca[0])
    a.append(ca[1:])

INF = 10**7
min_cost = INF
for k in range(2**n):
    purchase = [True if c == '1' else False for c in list(format(k, '0{}b'.format(n)))]
    cost = 0
    u = [0]*m
    for i in range(n):
        cost += c[i] if purchase[i] else 0
        for j in range(m):
            u[j] += a[i][j] if purchase[i] else 0

    if can_reach_the_goal(u, x) and cost < min_cost:
        min_cost = cost

if min_cost == INF:
    print(-1)
else:
    print(min_cost)

Fixed code:
def can_reach_the_goal(u, x):
    return min(u) >= x

n, m, x = map(int, input().split())

c = []
a = []
for i in range(n):
    ca = [int(row) for row in input().split()]
    c.append(ca[0])
    a.append(ca[1:])

INF = 10**7
min_cost = INF
for k in range(2**n):
    purchase = [True if c == '1' else False for c in list(format(k, '0{}b'.format(n)))]
    cost = 0
    u = [0]*m
    for i in range(n):
        cost += c[i] if purchase[i] else 0
        for j in range(m):
            u[j] += a[i][j] if purchase[i] else 0

    if can_reach_the_goal(u, x) and cost < min_cost:
        min_cost = cost

if min_cost == INF:
    print(-1)
else:
    print(min_cost)
Buggy code:
n, m, x = map(int, input().split())

ca = [[]]*n

for i in range(n):
    ca[i] = list(map(int, input().split()))

min = 10**15

for i in range(2**n):
    bin_i = bin(i)
    sum = 0
    point = [0]*m
    flag = 1
    l = len(bin_i)-2
    for j in range(l):
        if bin_i[-j-1] == "1":
            sum += ca[j][0]
            for k in range(m):
                point[k] += ca[j][k+1]

    for j in range(m):
        if point[j] >= x:
            pass
        else:
            flag = 0

    if flag:
        if sum <= min:
            min = sum

print(min)

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

ca = [[]]*n

for i in range(n):
    ca[i] = list(map(int, input().split()))

min = 10**15

for i in range(2**n):
    bin_i = bin(i)
    sum = 0
    point = [0]*m
    flag = 1
    l = len(bin_i)-2
    for j in range(l):
        if bin_i[-j-1] == "1":
            sum += ca[j][0]
            for k in range(m):
                point[k] += ca[j][k+1]

    for j in range(m):
        if point[j] >= x:
            pass
        else:
            flag = 0

    if flag:
        if sum <= min:
            min = sum

if min == 10**15:
    print("-1")
else:
    print(min)
Buggy code:
n, m, x = map(int,input().split(' '))
a = [[] for i in range(n)]
p = 0
for i in range(n):
    a[i] = list(map(int, input().split(' ')))
sc = 12 * 100001
for i in range(1, 2 ** n):
    bi = '0' * n + bin(i)[2:]
    bi = bi[len(bi) - n:]
    cc = 0
    e = [0] * m
    for j in range(n):
        if bi[j] == '1':
            for k in range(m):
                e[k] += a[j][k + 1]
            cc += a[j][0]
    su =True
    for j in range(m):
        su &= e[j] >= x
    if su:
        sc = min(sc, cc)
sc = -1 if sc > 12 * 100001 else sc
print(sc)

Fixed code:
n, m, x = map(int,input().split(' '))
a = [[] for i in range(n)]
p = 0
for i in range(n):
    a[i] = list(map(int, input().split(' ')))
sc = 12 * 100001
for i in range(1, 2 ** n):
    bi = '0' * n + bin(i)[2:]
    bi = bi[len(bi) - n:]
    cc = 0
    e = [0] * m
    for j in range(n):
        if bi[j] == '1':
            for k in range(m):
                e[k] += a[j][k + 1]
            cc += a[j][0]
    su =True
    for j in range(m):
        su &= e[j] >= x
    if su:
        sc = min(sc, cc)
sc = -1 if sc > 12 * 100000 else sc
print(sc)
Buggy code:
n, k = map(int, input().split())
a = list(map(int, input().split()))

visited = [1]
is_visited = [0] * n
now = 1
step = 0
for i in range(k):
    now = a[now-1]
    step += 1

    if is_visited[now-1] == 0:
        is_visited[now-1] = 1
    else:
        ind = visited.index(now)
        loop = visited[ind:]
        tmp = (k-step) % len(loop)
        now = loop[tmp]
        break

print(now)


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

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

visited = [1]
is_visited = [0] * n
now = 1
step = 0
for i in range(k):
    now = a[now-1]
    step += 1
    if is_visited[now-1] == 0:
        is_visited[now-1] = 1
        visited.append(now)
    else:
        ind = visited.index(now)
        loop = visited[ind:]
        tmp = (k-step) % len(loop)
        now = loop[tmp]
        break

print(now)
Buggy code:
def main():
    import sys
    input = sys.stdin.readline

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

    # N = 2*(10**4)
    # K = 10**18
    # A = [i+2 for i in range(N)]
    # A[-1] = 1
    # print(A)

    visited = [0]
    visited_set = set([0])
    now = 0
    ind = 0
    my_append = visited.append
    my_add = visited_set.add
    for i in range(K):
        a = A[now]-1
        if a in visited_set:
            ind = i
            break
        else:
            my_add(a)
            my_append(a)
            now = a
            # ind = i

    loop_visited = visited[ind:]
    ans_ind = (K-ind) % len(loop_visited)

    print(loop_visited[ans_ind]+1)


if __name__ == "__main__":
    main()


Fixed code:
def main():
    import sys
    input = sys.stdin.readline

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

    # N = 2*(10**4)
    # K = 10**18
    # A = [i+2 for i in range(N)]
    # A[-1] = 1
    # print(A)

    visited = [0]
    visited_set = set([0])
    now = 0
    ind = 0
    my_append = visited.append
    my_add = visited_set.add
    for i in range(K):
        a = A[now]-1
        if a in visited_set:
            ind = visited.index(a)
            break
        else:
            my_add(a)
            my_append(a)
            now = a
            # ind = i

    loop_visited = visited[ind:]
    ans_ind = (K-ind) % len(loop_visited)

    print(loop_visited[ans_ind]+1)


if __name__ == "__main__":
    main()
Buggy code:
N, K = map(int, input().split())
A = list(map(int, input().split()))
l = [0 for _ in range(N)]

now = 0
l[now] = 1
count = 0
loop = []

while count < K:
    count += 1
    now = A[now]-1
    loop.append(now)
    if l[now] == 1:
        loop = loop[loop.index(now):-1]
        break
    else:
        l[now] = 1

if count == K:
    print(now + 1)
else:
    ans = loop[K % count]
    print(ans + 1)


Fixed code:
N, K = map(int, input().split())
A = list(map(int, input().split()))
l = [0 for _ in range(N)]

now = 0
l[now] = 1
count = 0
loop = [0]

while count < K:
    count += 1
    now = A[now]-1
    loop.append(now)
    if l[now] == 1:
        loop = loop[loop.index(now):-1]
        break
    else:
        l[now] = 1

if count == K:
    print(now + 1)
else:
    ans = loop[(K-count) % len(loop)]
    print(ans + 1)
Buggy code:
            
import sys
stdin=sys.stdin

ns = lambda:stdin.readline().rstrip()
ni = lambda:int(stdin.readline().rstrip())
nm = lambda:map(int,stdin.readline().split())
nl = lambda:list(map(int,stdin.readline().split()))

N,K=nm()
A=nl()

city_l=[0]
city_l.append(1)
city_c=[0]*(N+1)
city_c[1]+=1
n_city=A[0]
flag=True
r_start=-1
r_end=-1
while(flag):
    city_c[n_city]+=1
    city_l.append(n_city)
    if(city_c[n_city]>1):
        r_start=city_l.index(n_city)
        r_end=len(city_l)-1
        city_l.append(A[n_city-1])
        flag=False
    n_city=A[n_city-1]

if(K<=r_end):
    print(city_l[K])


else:
    K2=K-r_end+1
    K2=K2%(r_end-r_start)
    if(K2==0):
       print(city_l[r_end-1])
    else:
       print(city_l[r_start+K2])

Fixed code:
            
import sys
stdin=sys.stdin

ns = lambda:stdin.readline().rstrip()
ni = lambda:int(stdin.readline().rstrip())
nm = lambda:map(int,stdin.readline().split())
nl = lambda:list(map(int,stdin.readline().split()))

N,K=nm()
A=nl()

city_l=[0]
city_l.append(1)
city_c=[0]*(N+1)
city_c[1]+=1
n_city=A[0]
flag=True
r_start=-1
r_end=-1
while(flag):
    city_c[n_city]+=1
    city_l.append(n_city)
    if(city_c[n_city]>1):
        r_start=city_l.index(n_city)
        r_end=len(city_l)-1
        city_l.append(A[n_city-1])
        flag=False
    n_city=A[n_city-1]

if(K<=r_end):
    print(A[city_l[K]-1])


else:
    K2=K-r_end+1
    K2=K2%(r_end-r_start)
    if(K2==0):
       print(city_l[r_end])
    else:
       print(city_l[r_start+K2])
Buggy code:
n, k = map(int, input().split())
a = [0] + list(map(int, input().split()))

journey = [1]

for i in range(2 * n + 100):
    next = a[journey[-1]]
    journey.append(next)

if k < n+1:
    print(journey[k])
    exit()

loop_end = journey[n]

loop_start = n - 1

while (journey[loop_start] != loop_end):
    loop_start -= 1

period = loop_end - loop_start
k %= period

while k < n:
    k += period

print(journey[k])


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

journey = [1]

for i in range(2 * n + 100):
    next = a[journey[-1]]
    journey.append(next)

if k < n+1:
    print(journey[k])
    exit()

loop_end = n

loop_start = n - 1

while (journey[loop_start] != journey[loop_end]):
    loop_start -= 1

period = loop_end - loop_start
k %= period

while k < n:
    k += period

print(journey[k])
Buggy code:
import sys
n,k=map(int,input().split())
alist=list(map(int,input().split()))

vislist=[1]
visset={1}
loopflag=True
endflag=False
donek=0
ima=1

while loopflag:
    ima=alist[ima-1]
    if ima in visset:
        loopflag=False
        if ima == alist[ima-1]:
            endflag=True
    else:
        vislist.append(ima)
        visset.add(ima)

        donek+=1

        if donek == k:
            loopflag=False
            endflag=True

if endflag:
    print(ima)
    sys.exit()

loopstartindex=vislist.index(ima)
looplength=len(visset)-loopstartindex
if (k+1-loopstartindex)%looplength == 0:
    print(vislist[loopstartindex])
else:
    print(vislist[loopstartindex+(k+1-loopstartindex)%looplength-1])



Fixed code:
import sys
n,k=map(int,input().split())
alist=list(map(int,input().split()))

vislist=[1]
visset={1}
loopflag=True
endflag=False
donek=0
ima=1

while loopflag:
    ima=alist[ima-1]
    if ima in visset:
        loopflag=False
        if ima == alist[ima-1]:
            endflag=True
    else:
        vislist.append(ima)
        visset.add(ima)

        donek+=1

        if donek == k:
            loopflag=False
            endflag=True

if endflag:
    print(ima)
    sys.exit()

loopstartindex=vislist.index(ima)
looplength=len(visset)-loopstartindex
if (k+1-loopstartindex)%looplength == 0:
    print(vislist[-1])
else:
    print(vislist[loopstartindex+(k+1-loopstartindex)%looplength-1])
Buggy code:
import sys
n,k=map(int,input().split())
a=list(map(int,input().split()))
visited=[0]*n
town=0
Town=0
visited[0]=0
lst=[]
if a[0]==1:
  print(1)
  sys.exit()
for i in range(n):
  town=a[town]-1
  if visited[town]!=0 or town==0:
    lst.append([town,visited[town],i+1])
    break
  else:
    visited[town]=i+1
Lst=[]
print(lst)
town=lst[0][0]
Lst.append(town)
if lst[0][2]-lst[0][1]-1==0:
  if k<lst[0][1]:
    print(visited.index(k)+1)
    sys.exit()
  else:
    print(lst[0][0]+1)
    sys.exit()
for i in range(lst[0][2]-lst[0][1]-1):
  town=a[town]-1
  Lst.append(town)
if k<=lst[0][1]:
  print(visited.index(k)+1)
else:
  k=k-lst[0][1]
  l=len(Lst)
  k=k%l
  print(Lst[k]+1)


Fixed code:
import sys
n,k=map(int,input().split())
a=list(map(int,input().split()))
visited=[0]*n
town=0
Town=0
visited[0]=0
lst=[]
if a[0]==1:
  print(1)
  sys.exit()
for i in range(n):
  town=a[town]-1
  if visited[town]!=0 or town==0:
    lst.append([town,visited[town],i+1])
    break
  else:
    visited[town]=i+1
Lst=[]
town=lst[0][0]
Lst.append(town)
if lst[0][2]-lst[0][1]-1==0:
  if k<lst[0][1]:
    print(visited.index(k)+1)
    sys.exit()
  else:
    print(lst[0][0]+1)
    sys.exit()
for i in range(lst[0][2]-lst[0][1]-1):
  town=a[town]-1
  Lst.append(town)
if k<=lst[0][1]:
  print(visited.index(k)+1)
else:
  k=k-lst[0][1]
  l=len(Lst)
  k=k%l
  print(Lst[k]+1)
Buggy code:
def main():
    n,k=map(int,input().split())
    a=list(map(int,input().split()))
    cnt=0
    b=[1]
    res=[-1]*n
    res[0]=0
    flg=0
    now=1
    start=0
    t=1
    while flg==0:
        cnt+=1
        if res[a[now-1]-1]==-1:
            res[a[now-1]-1]=cnt
            b.append(a[now-1])
            now=a[now-1]
            print(now)
        else:
            start=res[a[now-1]-1]
            t=cnt-start
            if cnt<=k:
                flg=1
                k-=start
            else:
                flg=2
            print(cnt,a[now-1],res,flg)
    print(start,t)
    print(b)
    if flg==1:
        print(b[start+(k%t)])
    else:
        print(b[k])
if __name__=="__main__":
    main()

Fixed code:
def main():
    n,k=map(int,input().split())
    a=list(map(int,input().split()))
    cnt=0
    b=[1]
    res=[-1]*n
    res[0]=0
    flg=0
    now=1
    start=0
    t=1
    while flg==0:
        cnt+=1
        if res[a[now-1]-1]==-1:
            res[a[now-1]-1]=cnt
            b.append(a[now-1])
            now=a[now-1]
        else:
            start=res[a[now-1]-1]
            t=cnt-start
            if cnt<=k:
                flg=1
                k-=start
            else:
                flg=2
    if flg==1:
        print(b[start+(k%t)])
    else:
        print(b[k])
if __name__=="__main__":
    main()